cannot detect PSP in usb mode

Had a little problem when plug in the USB cable into my laptop and it is not detected.

1. Choose USB mode from the PSP setting, BEFORE plug the cable in.
2. PSP screen show USB mode.
3. Plug the cables in. It should be detected as storage device. Cheers.

Note: Check the connection. Plug them in properly.

Tried to transfer game into my relative's PSP. Hacked firmware. Just have to copy paste the game ISO file. In this case, FF: Tactics. I thought it would be different story and improved gameplay compare to the PS1 version. Well, just minor improvement here and there. It's a great game anyway. I like it.