CS data ? Wow, that’s rare. Are you able to make “normal” cs data transfer ?
Check that this feature is activated first, and that it works “normally”, under normal non-crypted transfers.
And if it’s all good, then move on to the next step.
The next step is to check the NSS side, because it is the only place where the actual content of the transfer might be a problem. Unfortuanetely i can’t help you there… contact your vendor 🙂