SqlWorkflowPersistenceService and stopping workflow runtime

Hi,

I wrote a windows service which retrieves messages from Microsoft
Message Queue and runs appropriate workflows. When I stop the service
it calls WorkflowRuntime.StopWorkflow and unload all unfinished (not
iddled) instances of workflow from memory to database. However
nexttimer column of those records in is set to date 9999-12-31 so it
never automatcally load it back when the service is started. Is this
behaviour correct and I have to run it manualy or am I doing something
wrong?

Thanks for any replays, Spud.