Data Protector Manager 10.0 - Invalid Message Format



I recently updated from Data Protector 8 to 10.00 Build 306.

Now the data protector manager is showing for almost all menus the error 'Invalid Message Format'.

Some menus open anway, but most are inaccessible e.g. Device&Media - Devices; Device&Media - Media - Pools.


I already searched on google, but just found a patch to be applied to previous versions. Nothing applicable to version 10.


Thanks for any help or suggestions