Acceleport RAS 8 No Dial Tone on XP

We are really struggling with this Acceleport RAS 8. We have a fax server that has grown from 2 fax cards to where we need 6-8. We went with an Acceleport RAS 8. We had a devil of a time getting Windows XP to even recognize the board, but we finally got it recognized and loaded new drivers and firmware (5.0.314). However, we keep getting No Dialtone. We put back the old cards we have dial tone. What do we need to do to get dial tom
e recognized on these lines?