iDisk and Finder - login problems

After 4 hours of phone calls and online chat with Apple I am here to ask the EXPERTS - Please help

I cannot access iDisk through finder - either off the icon bar to the left or via GO. I get one of two messages - iDisk is not available, or after being presented with a login window I get a message saying I have used the wrong username/password.

Now here is the thing
1. I am logged in correctly in System Preferences
2. I can sync
3. I can upload via iWeb
4. I can login over the net
5. I can login on my G4 Laptop (through Finder)
6. I can access my public area no problem (through finder)

BUT I CANNOT LOG ON TO MAIN iDISK AT ALL

This is now also effecting my use of SOE Tools so I cannot update iWeb headers and keywords anymore.

I run an Imac and have updated to Snow Leopard in the last week (perhaps that is the problem?)

Any new ideas would be great

Thanks