You may just want to redownload a fresh copy of Miui an reflash it. Could have been a bad download or install.
Sent From My Miui Havin, Gingerbread Throwing eVo4g
I've been running Miui on a HTC evo for a few months now and just loving it. Only thing that doesn't work it is 4G and fm radio.
Sent From My Miui Havin, Gingerbread Throwing eVo4g