Last night, I got I ringtone I really liked for my sony ericsson w580i. So, I connected my USB cable to my computer for the first time since I got the phone and it worked. Like the noise, that tells you something has been plugged in. I wasn't sure how to work it and so I did something wrong and it turned off and I didn't know how to turn it back on. Now, when I plug the USB in, it doesn't make the sound nor does it get recognized on the Sony Ericsson PC Companion software. I've tried wiping off the dust with my fingers, I checked lots of forums and nothing seems to help. My phone has no battery and my friend has my charger. (so the phone is off, it only turns on when the USB gets recognized) What should I do? Any ideas? THANKS.