MROF= Maximum Rate Of Fire with COPS off
See
HERE
CMROF= COPS Maximum Rate Of Fire with COPS on
See
HERE
To be honest when you read the manual the advise from WDP on both CMROF & MROF settings are exactly the same, basically dont set either higher than your hopper can feed.
I think your settings are a little on the wayward side at present, but I don't know why everyone thinks there must be some magical setting on the board somewhere that you can press a button and it takes of the 'chop' mode. Chances are it may well be a multitude of mechanical issues.
Best thing to do would be take it to a qualified tech and sit with them while they go through and check you gun over both the settings and your setup, that way you will have a greater understanding of how your gun operates and the correct settings to use.