Outlook 2007 has disabled Norton AntiSpam Outlook plugin

I use the newest verison of Norton 360 (as of 4/27/2014) and I have lost the Norton AntiSpam Outlook plugin or add-in (in MS speak) (specifically "msouplug.dll").  The MS Outlook Trust Center says the add-in was disabled by Outlook becasue it prevented Outlook from "functioning properly."  I have tried re-enabling the add-n and it continues to be rejected.  Is this a permanent issue or is there a patch??  (Running Vista Home Premium 64-bit OS)