You really haven't given much information..
Did it work before you compiled? (Assuming you did, "make" if you don't know). Also, if you were using a different qvm that used flags with a single character (help = h, etc), you will have to manually change those flags to the proper flags (help = help, ban and unban = ban, etc).
Please provide more information, the more you provide, the faster (and better) your answer.
-tibs