"Incomplete logon data" when trying to view BOR or Function Filter

I have added the a destination to the destinations folder under my portal server. I have checked the user mapping in the portal and my portal account maps to an account I am told does have RFC permissions. But I cannot view anything under the BOR or add a filter to view functions. I get the error in the subject line.

I can't make any further progress - any help would be appreciated. I am not a regular SAP user and have never logged in before...maybe its a config thing?