I write a program for mindstorm, and it works. It

Were the batteries still under warranty? Some rechargeable batteries just don't have a long life. It is worth the initial investment to buy top of the line batteries in the first place. They cost nearly double, but last 4 to 6 times longer. murf427

Sep 2, 2011 ... The link above will allow you to download a copy of the software for your set. ... Before you install LEGO MINDSTORMS NXT Software, please ... mindstorms.lego.com/en-US/News/ReadMore/Default.aspx?id=351333 mindstorms.lego.com/en-US/News/ReadMore/Default.aspx?id=351333

I did to

If you're getting the program from the RoboCenter, double check that all off the blocks are set right. If that doesn't work, open the programming software, click Tools> Update NXT Firmware. Connect your NXT with the USB (or it might work with Bluetooth...) Then click Check and download the latest firmware (or just click download). Don't be alarmed if the display turns off and the brick makes a ticking noise.

try:

1. changing cables
2. switching usb ports
3. using bluetooth
4. changing the batteries
5. if all above fails call lego custumer support at 1-800-838-9647

I just posted this same question, but after a little digging, I think I have the answer. There is a notice on the Mindstorm site that shows that the side motors need to be in ports B and C to work. They give a corrected diagram as well.

Port A is apparently for additional jobs, leading me to believe that it is only for programmed movement. This makes sense as you would not want your robot to continually sort or use an arm, etc. You would want it to move only when and how programmed.

Any Mindstorms pros wnat to confirm??

www.tweak3d.net/forums

Check this out. There are some great pics and stuff.
Hope this helps.

I know their are programs for this .but i dont know for which phones. is yours a pocket pc

is your NXT on? if not turn it onn

posibly missbuilt or miss programed