CrypKey 7.1 Activation Key

[nino]

I have never tried to crack a crypkey application before and all the information I found on the 'net is very old. So I started reverse engineering the application and the crypkey server but I realized it would take too long and someone might have walked this path before. So I would appreciate any current information regarding this protection that is pertinent to my case. The license server name is crp32002.ngn. I already figured out the master and the user keys from reverse engineering the application (mk is 256 hex digits long and uk is 26). The app prompts me for an activation key supplying a 28-hex-digit registration number.
I would really appreciate guidance for cracking this app.