Just want to know which iPod nano I have

connect your ipod to computer
open windows explorer
copy song from computer and paste at ipod drive
after copy disconnect ipod from computer
and you got the song

The ipod nanos the smallest product in the Apple iPod line. The fourth generation Nano comes in two different capacities, each capable of holding thousands of songs.

Capacities
1. The fourth generation iPod Nano comes in 8 GB and 16 GB models. The 8 GB version can hold 2,000 songs, and the 16 GB version can hold 4,000 songs.
Tips
2. Song capacity estimates are based on music encoded in Apple's proprietary format at a standard, average bitrate. The higher the bitrate, the better the quality. Songs deviating from Apple's standard (for example, CD-quality music or high bitrate MP3s) will use more disk space.
History
3. Nano's predecessor, the iPod Mini, was released on January 6, 2004, and was available with a 4 GB hard drive. The Nano was first released on September 7, 2005, and was the first iPod to use flash memory. It was first available in 2 GB and 4 GB versions. The fourth generation Nano was released on September 9, 2008.
Size
4. The fourth generation iPod Nano is 3.6" tall and 1.5" wide.
Video
5. The third generation Nano, released on September 5, 2007, was the first Nano to feature video playback. Storing videos on Nano can dramatically reduce the amount of songs it can hold.

hold down the menu button and the center button at the same time..it should reset itself

Use iTunes 8 to sync or delete songs, photos, etc. Just connect the iPod to computer, download iTunes 8 from the internet, open iTunes 8, and then double-click on the icon of the iPod Nano to Sync files to your Nano.
The manual for the iPod Nano can be found at www.apple.com/support

Musicmatch songs won't work on Ipods. Musicmatch has been discontinued since it was acquired by Yahoo last year. If you have songs in MP3 format those can be used in ITunes.

your probably trying to play the wrong playlist on the ipod.

The currently shipping iPod nano replaces the iPod mini. Both models use the "Clickwheel" (which places pressure sensitive navigation buttons underneath the scroll wheel) introduced with the iPod mini, but the similarities between the iPod mini and iPod nano end with the "Clickwheel". The iPod mini shipped in a colorful "ultra-portable (3.6 inch tall, 2.0 inch wide, 0.5 inch thick) lightweight anodized aluminum" case available in five stylish colors--silver, gold, pink, blue and green (four colors from February 23, 2005 to September 7, 2005 with gold no longer offered), each with a 1.67-inch "white backlit" monochrome LCD display. The iPod mini has either 4.0 GB or 6.0 GB hard drives to hold approximately 1,000 or 1,500 songs (encoded at 128-bit), respectively. The iPod nano, on the other hand, ships in a "impossibly small" 3.5 inch tall, 1.6 inch wide, and 0.27 inch thick "iBook white" or jet black and stainless steel case with a 1.5-inch "blue white backlit" 16-bit color LCD display. The iPod nano has either 2.0 GB or 4.0 GB of solid state Flash Memory and can hold approximately 500 or 1000 songs, respectively, in 128-Kbps AAC format and up to 25,000 "iPod nano-viewable" photographs

the "Clickwheel" (which places pressure sensitive navigation buttons underneath the scroll wheel) introduced with the iPod mini, but the similarities between the iPod mini and iPod nano end with the "Clickwheel". The iPod mini shipped in a colorful "ultra-portable (3.6 inch tall, 2.0 inch wide, 0.5 inch thick) lightweight anodized aluminum" case available in five stylish colors--silver, gold, pink, blue and green (four colors from February 23, 2005 to September 7, 2005 with gold no longer offered), each with a 1.67-inch "white backlit" monochrome LCD display. The iPod mini has either 4.0 GB or 6.0 GB hard drives to hold approximately 1,000 or 1,500 songs (encoded at 128-bit), respectively. The iPod nano, on the other hand, ships in a "impossibly small" 3.5 inch tall, 1.6 inch wide, and 0.27 inch thick "iBook white" or jet black and stainless steel case with a 1.5-inch "blue white backlit" 16-bit color LCD display. The iPod nano has either 2.0 GB or 4.0 GB of solid state Flash Memory and can hold approximately 500 or 1000 songs, respectively, in 128-Kbps AAC format and up to 25,000 "iPod nano-viewable" photographs

The currently shipping iPod nano replaces the iPod mini. Both models use the "Clickwheel" (which places pressure sensitive navigation buttons underneath the scroll wheel) introduced with the iPod mini, but the similarities between the iPod mini and iPod nano end with the "Clickwheel". The iPod mini shipped in a colorful "ultra-portable (3.6 inch tall, 2.0 inch wide, 0.5 inch thick) lightweight anodized aluminum" case available in five stylish colors--silver, gold, pink, blue and green (four colors from February 23, 2005 to September 7, 2005 with gold no longer offered), each with a 1.67-inch "white backlit" monochrome LCD display. The iPod mini has either 4.0 GB or 6.0 GB hard drives to hold approximately 1,000 or 1,500 songs (encoded at 128-bit), respectively. The iPod nano, on the other hand, ships in a "impossibly small" 3.5 inch tall, 1.6 inch wide, and 0.27 inch thick "iBook white" or jet black and stainless steel case with a 1.5-inch "blue white backlit" 16-bit color LCD display. The iPod nano has either 2.0 GB or 4.0 GB of solid state Flash Memory and can hold approximately 500 or 1000 songs, respectively, in 128-Kbps AAC format and up to 25,000 "iPod nano-viewable" photographs

The currently shipping iPod nano replaces the iPod mini. Both models use the "Clickwheel" (which places pressure sensitive navigation buttons underneath the scroll wheel) introduced with the iPod mini, but the similarities between the iPod mini and iPod nano end with the "Clickwheel". The iPod mini shipped in a colorful "ultra-portable (3.6 inch tall, 2.0 inch wide, 0.5 inch thick) lightweight anodized aluminum" case available in five stylish colors--silver, gold, pink, blue and green (four colors from February 23, 2005 to September 7, 2005 with gold no longer offered), each with a 1.67-inch "white backlit" monochrome LCD display. The iPod mini has either 4.0 GB or 6.0 GB hard drives to hold approximately 1,000 or 1,500 songs (encoded at 128-bit), respectively. The iPod nano, on the other hand, ships in a "impossibly small" 3.5 inch tall, 1.6 inch wide, and 0.27 inch thick "iBook white" or jet black and stainless steel case with a 1.5-inch "blue white backlit" 16-bit color LCD display. The iPod nano has either 2.0 GB or 4.0 GB of solid state Flash Memory and can hold approximately 500 or 1000 songs, respectively, in 128-Kbps AAC format and up to 25,000 "iPod nano-viewable" photographs