Phone disconnects when connected to PC

Posted by AlexRussell
Hello, when I try to flash my k800i, it connects fine, I connect it while holding "C" it connects fine, but after 5 seconds disconnects so that means I can't flash it...sometimes I successfully flashblocked the MAIN and SF files, but it disconnected while activating the system so it went stuck at that operation, MY PROBLEM IS IT DISCONNECTS RANDOMLY I HEAR THE SOUND OF USB DISCONNECTION.
NOTE: My cable is new, just bought it yesterday, the phone is not moved while flashing, so no problem of cable disconnection or anything...