iTunes 10.4 not seeing iPhone 4

[errolgreer]

I updated iTunes from 10.3.5 to 10.4.0.80 and now iTunes does not see the iPhone 4. If I bring back my entire system from an image backup everything works correctly. The update has caused this problem. Win 7 sees the iPhone and I can open photo files for example and copy them from "Computer" with no problem, so the computer sees the iPhone correctly, but not iTunes.

Is there some service which should be running, and if so how do I start it up ? BTW I disabled my firewall and all security software but this makes no difference. Any suggestions ?

Many thanks, Errol

 

[errolgreer]

Seems that if I leave it connected for about 15 minutes, it finally sees the iPhone 4. The older release saw it in about one minute ! WHY ?