I cant upload games in my psp using memory stick.why

If you have run games befor off your memory stick it could be your memory stick or the psp that is broken. however if you are trying for the 1st time. you cant run games of the memory stick without putting the game in the right format aswell as the memory stick.
The psp also has to have the right software on so that it can run games of a memory stck.

The problem might be with your memory stick dou that causes your PSP to hang up and reboot. I think your using a fake memory stick duo and your PSP is not stable. Please make sure that your memory stick is seagate supported. You can check that by simply going to your memory stick information. Your games are not deleted. The game is still on your memory stick, you just need to run again your PSP custom firmware and your enabler. To permanently resolve this, you need to buy a genuine Sony memory stick dou and then run again your PSP custom firmware and your enabler. You can access this link http://pspslimhacks.com/ for your PSP custom firmware and your enabler.

Be sure that you have CFW (Custom Firmware). If you dont' go to any gaming store and ask if they do PSP modifications Then, when you have your PSP connected to your computer, find your PSP directory under "My Computer" and create a new folder labeled "ISO". Place all your downloaded games into that folder and that should allow you to play the games from the game menu in the XMB under the memory stick.

Try a "Reformat" or your memory card. here's how.
I recommend that you do this every so often regardless, and particularly when you first buy a memory stick. Reformat it, on the Sony PSP. So that anything added by the memory stick manufacturer is removed, along with any hidden files you might have accidentally added.
You can format any size Memory Stick Duo in the Sony PSP by doing this:

1. Push the little HOME button on the bottom left of the face of the unit.
2. Use the arrow keys to move to the SETTINGS area, then move the up and down keys until you get to System Settings.
3. Once you are there, click on the "X" button and scroll up and down as needed to find Format Memory Stick. Click on "X" again to select that option.
4. The Sony PSP will now confirm that you want to reformat the memory stick (which removes every file and game save thereon, of course): choose yes and it'll format in just a few seconds.

Now you have a pristine new Memory Stick to work with and should have no problems with music, photos or other material you might wish to copy onto your PSP.

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If you already have an adaptor but still doesn’t work, you can buy a PSP USB data cable to transfer files between your computer and PSP.

try to solve that problem

thats what im searching for...
try to insert a umd

Turn the psp on go to system settings then format memory stick then insert the memory stick and format it and it should be fine.

u need to find a MP4 game and put it into e folder tt said MP4.. but is hard to find those game.. if u find some.. pls let me noe.. thanks..

U NEED TO GET AN NEW MEMORY STICK