've tried everything listed here in the KB article:
http://support.apple.com/kb/TS1363?viewlocale=en_US
Still no joy, I can see the phone in Vista, access photos and the like, but it doesn't show up in iTunes. Running the diagnostics, everything's green except for the "No iPhone or iPod found." Also connecting the iPhone cases Microsoft Sync Center to crash. Is this needed?
Works fine on my Powerbook, just not my Windows machine...
1. Make sure you have the latest version of iTunes on your Powerbook.
2. Restore your iphone using this latest version.
3. Make sure your iTunes on your PC is the latest version.
4. Restore your iphone again on the PC
Please remember to back up your files on your iphone before restoring.
Here is a reference link for your convenience:
http://www.apple.com/itunes/download/