CLEO requires FEBE to be installed. FEBE/CLEO are released in pairs. For instance, CLEO v4.2 requires FEBE v6.2. Depending at which version of FEBE you have installed, get the appropriate CLEO for the .
BTW, this isn't really the right forum for this post. After awhile, I'll move it to the FEBE/CLEO forum.