"Unable to load dataclass information from Sync Services"  Any ideas?

I upgraded to iTunes 7.7 last night and now I get an annoying constant stream of errors that read "AppleMobileDeviceHelper has stopped working". Multiple reinstalls have not stopped it.
Against my better judgement, I upgraded my phone to 2.0. Found out that I lost everything on my phone. It is activated and will work but I cannot sync it with iTunes. All I get is a message stating, "iTunes was unable to load dataclass information from Sync Services. Reconnect or try again later."
iTunes won't recognize my phone. I can move songs and stuff to it by drop and drag but if I click the "iPhone" in iTunes, nothing happens. I put my phone in recovery mode. iTunes linked to it and reinstalled 2.0 but I still get the same problem.
I'm real frustrated and Apple has not posted anything about this problem.
Does anyone have any ideas on what is the going on? Is my phone nerfed?

Try disabling your firewall, virus SW, and if it still won't sync, I would try disabling the communications services one by one until it clears. When I'm troubleshooting this sort of problem, I first look into the system reports (MY Computer, (right-click) manage, event viewer, Windows Logs, and look into each of the sub log sections for the error. This will often point you in the right direction. If this fails, I do a clean boot with all extraneous run-times and services disabled. usually the problem will be solved. I then start turning on the various run-time routines and services until I find the culprit.
My attitude about this is that I won't waste my time chasing problems like this unless they are critical. Paying $$$ for a 3G iPhone and then having to troubleshoot the SW is not my cup of tea. I only pursued this because my wife and both kids got 3G's but I have them running both XP and Vista. One Vista machine synced OK, but mine would not. Intellectual curiosity led to find out why.
Lysimakus

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