Depending on the OS version and on the type of hardware protection key, You need to install some of these drivers. - Hardlock for the black parallel-port protection key - Smartkey for the white parallel-port protection key - Smartkey-USB for the USB key Furthermore, some versions of Windows do not contain the THREED32.OCX component. If Ramsete complains that this file is missing, get it from here, and copy it in c:\Windows\System32 Similarly, on some other systems it is necessary to copy the file named SKEYDRV.DLL in the C.\Windows\System32 directory These problems will be fixed in the forthcoming version 1.9/2.2 of the Ramsete package