Error upgrading to Plesk 10.

[quickie]

Starting installation of packages
upgrading MySQL server...
Unexpected error
Error: Some action sequence of package 'mysql-client' has been failed with code -1
Not all packages were installed.
Please, contact product technical support.

 

[Lofas]

Upgrade problem

File: upgrade-assist.exe
Directory: d:\Program Files\Parallels\Plesk\Admin\bin\
Size: 1392640
MSI: Action 7:58:17: SwitchToMySql. Switching Panel Database to MySQL Server
MSI: Action 7:58:20: Rollback. Rolling back action:
Switching Panel Database to MySQL Server
Copying new files
Updating component registration
Unexpected error
Error: Some action sequence of package 'upgrade-assist' has been failed with code -1
Not all packages were installed.
Please, contact product technical support.

Can somebody help please.