IOS 4.0 Sync Error (-20). Please Help

Hi,
I have a Sync Error(-20) on my 3GS with iOS 4.0.
Can you help me please ?
Thx

Hi Remiol,
I had the same issue.
Go to iTunes
Click on iTunes in the menu bar
Select preferences
Select devices
Delete all instances of backups for your iphone 3GS
Click on the OK button
Sync your iPhone with iTunes
Your problem should be resolved - it did it for me.
Cheers,
LAUK.

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