Weird Problems

hey everyone,

Ive been having some problems lately with what i suspect is a itunes or computer problem regarding my ipods

I have both a 2G shuffle and a 5G Ipod video, when i connect either ipod to my computer they appear in the my computer tab, but once itunes detects them they dissappear. Now in itunes it detects the ipod with no worries does a small sync says that its succesfull and shows in itunes now when i add a few more things to my ipod and click apply it says that it is syncing the ipod But no "do not disconnect" screen appears on the ipod.

After a minute or 2 i get an error on itunes "The ipod ... cannot sync because the required disc cannot be found" i have tried everything and the only way i can get it to sync ONCE and only once it does not re-sync after woulds is to delete everything re-install the cd that my ipod came with and do a full restore to the first software, the re-install itunes 7 update and sync.

Once i remove it it does not sync again. I get the Same message with my shuffle, so as part as my trubble shooting i connected it to my mac and it synced with no issues at all.

I have tried everything that i can find on the apple site, but nothing can fix my issues, so i know have come here for help.

Any replies are greatly appreciated i just hope i can fix this problem.

Thanx in advanced
Nik