i had a few errors like taht so i re read the guide i noticed i had "missed" a few things out, go back and check EVERYTHING i have got mine up n running perfectly fine (CD Files)(Thanks to help from kaori and farril luv them 2 tbh)
i found i got an error if i didnt put a \ on the end of all my directories in the !setup.txt
also try using kaoricrypt instead of the didgy thing it comes with his/her one is much better imo
when i had my map folder ut in rong it said the exception there, i noticed the eception comes after an error :P and in my case the filename for maps be d:\mir3server\map\
yourse is summin like c:\mir3\map\ remeber the back slahs then it might work hope it helps if not i wasted 10mins talkin out of my arse and completely wasted ur time reading this
good luck tho