USB port power failure?

I'm a user of Macbook Pro 13'' Early 2011, OS X Lion pre-installed. I'm having a tiny problem with my USB port located the nearest from the front. Everytime I freshly boot-up to either Mac OS X or Window with a pre-plugged optical mouse I cannot move the cursor with my USB Mouse light show there is power on under the mouse. However, after I restart the computer again it able to moves with the mouse still plugged in.
And this USB port seem to confuse keyboard driver with USB flash under my Window 7. Thus I cannot properly eject my flash when I plug everything to this port or I lose the built-in keyboard.
P.S: I already try resetting every RAM configuration and do a clean install of Mac OS X. But  still not working.
Desperately NEED HELP!!!
Any suggestion, would be appreciated.

Did you try both USB ports? Apparently on a MacBook the front port is the one to use, as the back port shares its bus with the trackpad, camera, bluetooth, etc. See this web page:
http://www.wired.com/gadgetlab/2008/05/the-macbook-all/
That said, I am investigating this topic on behalf of two clients whose MacBooks appear to have intermittent USB connectivity.

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