unfortunately, I had never one of those zaptel cards myself. I was using zaphfc for some time. First look at this to get background information: http://www.voip-info.org/wiki-Asterisk+Zaptel+Installation
ignore the steps about compiling and such, if i remember correctly we should ship all pieces. Look at the install section in that wiki to compare if all needed modules are available and loaded for your card. A bit below there is a "testing and status.." section, it shows some helpful commands to further diagnose the problem. Work bottom up, so make sure the kernel drivers are there, then verify if the channel is there, then check your extensions...
Please report back and do not hesitate to ask if you encounter any problems, I'm sure we can get this to work, and the card would be usable for some scenarios.