First thing that I would do is to verify what channel they are sending. The first channel would be my guess. Also did you set the WIC up for only one channel?
(config-if)#service-module t1 timeslots ?
Also have them loop the Ckt towards you and see if your interface shows (looped). If they can't loop it (which they should be able to) go to the smartjack and loop it yourself.
However, you should get a CD even if all of this is not correct. Might check cabling and also the smartjack to see if it is LOS.
Good Luck.