XT-CM and cams

Hi again,
I am also having trouble with an XT-CM. I set this one up for a friend, and used a Trex cam for simplicity (so I can just send a loader card to him when Pred changes).
Unfortunately it doesn't seem to like cams, and kept freezing up. I decided to install the patch software in the hope that I could then disable the internal emulation and leave the cam to get on with its business (I guess in the future when there are no more patches, this will become a larger issue), but that didn't work.
Since I would like to leave the cam in it, is there any way I can sort this out ?