Help me please!
Greyed Client tasks cannot be Vieved or Edited. In this case the greyed objects in Client Tasks need to bee removed, at the moment they are causing problems.
We run EPO 4.5 (build 851)
Please check what it says under: 'User Management - Users - Permissions sets' for the account you are using to log into ePO.
After that see if the permissions set details have restrictions on what you can do with that user under 'User Management - Permissions sets'