Extra memory I want to place more memory. Which memory do I have to buy? How do I place them I bought 2 NCPD7audr-50M8A 1 GB PC 3200 but they don't work when I place them

if the memory supports those frequencies, in most cases it would work, now depending if the board is proprietary, like dell or some hp's, then you may run into compatibility issues. you can find this information from the manufactures website.

2GB memory max 1GB per slot

As i know netbook only have 1 DIMM slot, that mean you can't install another module on that netbook, but you can replace the current module (1 GB) with your 2 GB module.

In an attempt at finding your user manual, I dicovered that this is the closest thing they have. So... What I would do is follow the directions in the link above for removing the memory. Then I would read the label to determine what kind of memory is in it. If it is DDR1 (PC-1600 - PC-3200) then the max will be 1 GB x no of slots your machine has, Thus if you have two slots your max will be 2 GB (1 GB x 2 slots = 2 GB). If it is DDR2 (PC2-3200 - PC2-8500) then you max will be 2GB x no of slots. If it is DDR3 (PC3-6400 - PC3-17000) then the max will be 4 GB x no of slots.

Best regards

Yes. That motherboard can handle a total of 2048 (2 GB) of DDR PC 3200 (AKA DDR 400).

it has 1 gb ram. if you bay 1 gb it will be 2 gb.  if you buy 2 gb you can use together but it supportes only 2 gb. you can only see 2 gb.

Most ram has to go in pairs. Buy another stick of the 1GB, and it will run fine.

I recommend buying the memory from crucial which is 100% guaranteed to work on your system, if you want to buy the memory at a local store, please print out or write the memory type down on a paper from the crucial memory scanner to know the right type of memory to buy.

first u have to notice bus speed of old ram .it also 333[pc 3200]or not.

Leif: The difference in the numbers (2700 versus 3200) is speed rating-- basically, the higher the number the faster the RAM. Your computer is currently using 2700, so it's safe to use 3200, it's just faster than is currently used/specified.
Your computer is a Socket A - AMD Via-based board, so it is likely the motherboard will accept 1 GB memory modules. With three slots open, you would want to buy 2, 1-GB modules for best results. At current pricing, that would cost about $100. 2- 512MB modules would be next-best and around $55. Be sure to place the two modules in the slots next to each other, and closest to the processor for best results.