Yamaha DTXpress/DTXplorer/DTXtreme

Hi i'm new to this group and have a question about my DTxpress. 
Somehow the rims don't show up in the voice menu anny more when i 
hit them. They also don't sound . I'm using the tp60 pads. I 
borrowed this set from a friend of mine and i'm not sure these pads 
are able to sound rim shots . He says they should. Can somebody tell 
me if that is right ? For the floor tom i use a tp80S and that works 
o.k.I tried a factory reset but that didn't solve anything. I even 
put the TP80s on the snare trigger. Than the rim doesn't show. Maybe 
something wrong with the module ? I hope somebody has some good 
advise for me....

Maarten.