Problem with print queue

I have a problem with a print queue that keeps going down on me every couple of days. When it happens I run an 'enable' and all is fine for a few more days.

Can anyone can tell me where to start looking to debug this problem as i am new to UNIX

Thanx

hi next time it comes up execute a lpstat and also try enable and then execute a enq -f (file_name) , verify if idle characteristics are not kicking in