It seems that you are getting an error in the "Reports and Activities" -> "RDBMS Synchronization" :
Reason: UDV VSA error - User Defined Vendor/VSA operation failed (Vendor is not user defined)
The problem is that Radius (Nortel) is an existing Vendor in ACS and not a vendor that was added by the user (UDV). Actions 352 and 353 are used in conjunction with action 350 , only for UDVs.
I guess that the workaround for the SW version for adding attributes to default,existing vendors was by adding it directly to the dictionary within the registry.
Install patch for the appliance if needed (just make sure the full list of all attributes you want to add to Radius (Nortel)).