[otrs] Priority Status does not stick to what its set to.

Hello, I am very very much an OTRS n00b, and have inherited the system from previous IT employee. Our Build is: OTRS Version: *2.1*, patch *4*, last updated on *January 2007 *My question is regarding the status set to the tickets priority. When the priority of a ticket has been set to "High", and we go back into the ticket its priority has downgraded to default. I am sorry if my description is vague, but I do not know a whole lot about the software.