event id 2424 Windows SharePoint Services 3 Search error

I keep getting this event in my event viewer.  I have sharepoint and sql express installed on the same server.  It is on its own domain and the DC is a seperate server.  I do not have a built in account running as the service accout.  I have a domain user set up to run the service account... Does it need to be a local user or should a domain user work?  

For the content Access Account I also have a domain user set up

For Search I am using SQL Authentication with a DB user

   Event Type:      Error
Event Source:      Windows SharePoint Services 3 Search
Event Category:      Gatherer
Event ID:      2424
Date:            7/07/2008
Time:            3:21:10 PM
User:            N/A
Computer:      SPS
Description:
The update cannot be started because the content sources cannot be accessed. Fix the errors and try the update again.

Context: Application 'Search', Catalog 'index file on the search server Search'

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