much as i absolutely hate mxmoni.....
path is to C programs X86 winmx
is that win7 (or vista) 64bit i smell?
open the program folder for winmx... right click winmx.exe & select properties... in compatibility tab tick 'run as admin' ..... open folder for mxmoni... right click mxmoni.exe and do the same as you did for mx....
now try again....