You really should tell us what your system specifications are. Windows9x?? What version of DX?? CPU speed? ram? Video card, sound card? Maybe if you can what video/sound card drivers you are using (find out using "DXdiag").
What else is running in the back ground when AH is running? (perform a [ctrl] [alt] [del] ONCE to find out. Do not hit that combo twice or you'll reboot of course)
Then, somone may have a solution or be able to point at the most likely cause of what the problem is.
-Westy