Thanks for the advice. I've tried to run it in c:\windows\system32 and i've got an error that the file cannot be found. Then I just used c:\inst and it works. Perhaps some restrictions. Don't know but now it works perfect! Thanks!
Sorry for this Question, but I'am not sure. Is zImage running on Server 2012 and ?or Server 2016 under IIS (as 32bit application for classic asp). When trying to register the dll I'am getting an error.