Reply to Xtreme Mapping import issue

Decided to give the program a go, and really wanted to edit my existing APC mapping rather than start from scratch.

I can import my old RMX TSI's no problem, have even imported the pretty nifty T2 mapping that was put up here without any issues.. my own one though, nope nothing, blank screen.

Any ideas before I go re-mapping everything the way I had it ?