Phone locking up, hard resetting on reboot

[aindfan]

Hello everyone,

I've been lurking around here in awe of the ROMs that are being built and even trying out some of them, and it's too bad that I haven't contributed much, but I hope this great community can help out with this very strange issue.

Yesterday, I flashed GrooveROM4 with winmo 6.5 and was having some trouble with it (it would lock up every so often and when I pulled the battery to reset it would hard reset itself). After wrestling with the phone a bit, I managed to flash it to MightyROM 4.7 by uploading the DIAMIMG.nbh file to MegaUpload and downloading it through the phone's IE, because my USB connection isn't working: when I plug it into my computer, it charges, but when I plug it into the wall, it pops up the screen asking if I want ActiveSync, USB, or Internet Sharing. When I was on GrooveROM I blamed the failures on the fact that 6.5 is still in beta, but MightROM is generally quite stable. Does anyone have any idea how I can get this thing to work? At least to get it locked for a trip to the Sprint store? (USB connection isn't working, even in the bootloader, so I think I'd have to upload each ROM I need to somewhere and download it to my phone, then flash from there, this probably goes for the Security Relocker).

Thanks in advance for all of the help!