Unable to sync

Hi
I have a problem with a 4S running 0.1 - when I try to sync it with itunes(wirelessly or with usb) iTunes starts syncing it(making a reserve copy) and then an error for applemobilebackup.exe pops up stating that some memory could not be read, after skipping this itunes tries to copy purchases and fails there with a message "Unable to sync iphone, device disconnected"(translated, but the original meaning is intact)

Any advice?

 

The same issue was present with touch 2g, but it started unexpectedly and fixed itself after copyin purchases to pc
On 4S it was present from the beginning. I tried reinstalling itunes, copying purchases and all that
It seems that een if doesnt fail with applemobilebackup.exe error about memory it definitely fails at the purchase copying step

 

anyone?

 

anyone?