OME - DSM Essentials Network Monitor service terminated unexpectedly

We have been running OME for a few months now and we are now seeing in the windows event log the following error..

Application Event Log :

The description for Event ID 0 from source Essentials Services cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event:

A scheduled status poll has not been started because a status poll is already in progress. If this condition continues, it is recommended that you increase the status poll interval time. Scheduled time: 08/21/12 15:04:02. The following managed devices are still undergoing a status poll: 

System Event Log :

The DSM Essentials Network Monitor service terminated unexpectedly.  It has done this 39 time(s).  The following corrective action will be taken in 300000 milliseconds: Restart the service.

and in application  itself we are also seeing an SQL insert into error

Critical

21/08/2012 6:54:32 PM

Inventory Manager Exception; Device: -2069960952 , Exception: Failed to insert or update records due to non-unique data in columns of table. : Error executing the SQL Statement:INSERT INTO ContactInfo (ContactDescription,ContactName,DeviceId) VALUES(?,?,?) Error: SQL_ERROR results: SQL Error State: 23000, Native Error Code: 223, ODBC Error Text: [Microsoft][ODBC SQL Server Driver][SQL Server]The INSERT statement conflicted with the FOREIGN KEY constraint "FK_ContactInfo_Device". The conflict occurred in database "OMEssentials", table "dbo.Device", column 'DeviceId'. SQL_ERROR results continued: SQL Error State: 01000, Native Error Code: E25, ODBC Error Text: [Microsoft][ODBC SQL Server Driver][SQL Server]The statement has been terminated. ODBC_DatabaseConnection::AddTableRow()

Regard's

Jody