When is your application "in process" from?
Also - where exactly did you read security hasnt started - Is it blank or specifically says "not started" under new value/ Update ( and what date was last update)?
The reason I ask is because, Security results are never disclosed in GCMS notes due to national security reasons. I have mine as blank ( 2 month old GCMS notes) - Agent told me its complete.
I wouldnt worry about it too much. There was a guy on this thread/forum, who had the same thing but got PPR in few days ( and he argued with me that how his security hasnt started even after i told him the above)