[ghostofmybrain]

I just noticed that mine says "Host_MapGroup_f: No mapgroup specified" as well. I haven't run a map group in a really long time, but I remember several years ago it wouldn't allow custom map group names (you had to, for example, just change the maps listed in "mg_bomb" to match yours). Try that and see if it works.

EDIT: No, that doesn't work at all.