Digital BW, The Print

I am printing on 309gsm Photo Rag using my Epson C80. Every sheet slips
about a quarter inch which throws off image placement and wastes expensive
paper. Regular office paper goes through fine, even 189gsm photo rag seems
to be problem free.

I don't know how to increase the friction between the paper and the feeder
belt, any ideas?

Thanks,
Allyen