Versant 2100 belt walking

My versant all the sudden started belt walking on the fuser. So I put a brand new fuser assembly into the machine and it did the same thing. The latches for the top cover are seated properly around the bearings. I did notice the lower pressure roller looks a little worn (has wrinkles in it). Could this be the cause? Any other ideas? It seems to last longer with card stock before throwing the error. When I run text weight it gets about 5 sheets and it has walked out of range. Any help is greatly appreciated.

What's In Your Warehouse

What's In Your Warehouse? Are You Sure?
In an average week you process what, 50 jobs?100? 150? 200? Let’s say about half of each job hits the mail or goes out to the customer. The rest goes to shelves in your warehouse so it’s ready when the client needs it. Juggling all this—and making money from it— requires Link to Article