Yes I have the LM Model and I get my maps from garmin, could this be the issue?

Yes I have the LM Model and I get my maps from garmin, could this be the issue? If so how do I fix it? Sorry didn't mean to double post but I went and reinstalled the 2012.40 map and it deleted the 3060050A.JCV from my JCV folder, the first time I installed the new maps both of my JCV files were still in the folder, so I'm wondering why would it delete the new JCV but not the old ones? Does this mean i have to do a hard reset, then update my garmin, and then do the enabling all over? What would you suggest, I am so noob at this.