Do you have a GUI desktop? If so please go to YaST .. “Service Management” interface and see the status of MONyog there (and if it shows up there at all).
.. but our documentation at http://monyogkb.webyog.com/article/17-linux-installation should deal with use of the “zypper” command. yast/yast2 are deprecated as commands and yast is now only the name of various interfaces for system management on SuSE.
I never installed MONyog from neither yast/yast2 nor zypper commands. They will check for dependencies in the software repositories registered on the system. MONyog has no dependencies and SuSE’s repositories don’t know MONyog. I simply always right-clicked the RPM and chose “install package” (this will bypass dependency checks, but with MONyog it is OK as there is no need to perform a dependency check)