Please Help! I have a subscription/replication issue with the error - Replication-Replication Distribution Subsystem: agent (null) failed. The publication 'blah' does not exist.

I keep getting this error and my subscription table isn't populating:
The publication 'publish_playerSession_off_serverABC' does not exist.

Other setup items: 
1) Both servers are on the same domain Windows Server 2008 running SQL Server 2008 and the SQL agent is running under a network account. 
2) I have the publication destination on a shared network drive & the network account mentioned above has access to this drive. 

Thanks in Advance! Carl 

Carl