i am using a wireless mouse... but lately it goes invisible... Any one else have this problem?... Or can anyone tell me how to solve this annoying problem?...
i'm using Mac OS X..... Version... 10.6.8... it drives me crazy... Thanks for any help

Invisible mouse?
Do you mean that you lose the mouse pointer? (or does your mouse REALLY disappear :D)
Is your mouse an Apple bluetooth mouse, or an RF wireless from another manufacturer?
Do you have a wired USB mouse that you can try?

Also see if a Reset Your PRAM (http://support.apple.com/kb/HT1379) might help.

You need to reinstall the mouse software and see it works

This is not Windows.
A mouse doesn't need extra software to work on a Mac, and is unlikely to make a difference.