Errors after NAC/EC upgrade.

Hello!

I upgraded to EC 4.0 and NAC 3.3 and things seemed to go smoothly. However, were were checking server application logs and found this:

Event Type: Error
Event Source: Sophos NAC
Event Category: CurrentDefsLoader
Event ID: 1007
Date:  4/2/2010
Time:  3:46:02 PM
User:  N/A
Computer: PBHDC1
Description:
Failure obtaining hash value for definition stored in database.
-- Sophos NAC Exception Details --
Source Message: Failure getting hash value from Sql.
Source: CurrentDefsLoader
Source Timestamp: 4/2/2010 3:46:02 PM
Source Machine: PBHDC1
Source Exception Type: Sophos.NAC.Core.ExceptionManagement.EndForceException
Source: CurrentDefsLoader
Target: Int32 GetHash()
Source App Domain: CurrentDefsLoader.exe
Source Thread Id: 1
Source Thread Identity:
Source Win Identity: PBHCPA\SophosNAC
Help Link:
Source Stack Trace:

--Runtime Evidence--
  -- System Exception Details --(Contained Exception)
  Message: The formal parameter "@providerName" was not declared as an OUTPUT parameter, but the actual parameter passed in requested output.
  Type: OleDbException
  Source: Microsoft OLE DB Provider for SQL Server
  Target: System.Data.OleDb.OleDbDataReader ExecuteReaderInternal(System.Data.CommandBehavior, System.String)
  Stack Trace:
   System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
   System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
   CurrentDefsLoader.CurrentDefsDb.GetHash()

  Help Link:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

I checked and the EC and it seems to be updating but these errors are popping up at random intervals, sometimes an hour apart and then maybe not until the next day. What can be done to clear this error up?