I'm trying to run the Mixman DM2 Music Mixer software in wine but I get this error message:

wine: Call from 0x1c302388 to unimplemented function user32.dll.UnregisterDeviceNotification, aborting
wine: Unhandled exception (thread 000a), starting debugger...
WineDbg starting on pid 0x8
Unhandled exception: unimplemented function user32.dll.UnregisterDeviceNotification called in 32-bit code (0x778f4051).
In 32 bit mode.
Register dump:
 CS:0073 SS:007b DS:007b ES:007b FS:003b GS:0033
 EIP:778f4051 ESP:7d7c9434 EBP:7d7c9498 EFLAGS:00200212(   - 00      - -IA1)
 EAX:7d7c9440 EBX:779976f4 ECX:779bfe40 EDX:00010034
 ESI:00000000 EDI:00000000
Stack dump:
0x7d7c9434:  779976f4 00010034 00000001 80000100
0x7d7c9444:  00000001 00000000 1c302388 00000002
0x7d7c9454:  77973ce0 77973fb5 7d7c9468 7d7ca044
0x7d7c9464:  00000000 00010034 00000010 00000000
0x7d7c9474:  00000000 00001f3f 00000000 00000000
0x7d7c9484:  7794a18d 779976f4 00000000 7d7c9504
=>1 0x778f4051 in user32 (+0x4051) (0x7d7c9498)
  2 0x778f4556 in user32 (+0x4556) (0x7d7c94a8)
  3 0x1c302388 SendCommonCmd@16 in mixmanusbcontroller (0x7d7c94b8)
  4 0x7796bfdb WINPROC_wrapper in user32 (0x7d7c94dc)
  5 0x7796c2e5 WINPROC_wrapper in user32 (0x7d7c9508)
  6 0x77972bf2 CallWindowProcA in user32 (0x7d7c9538)
  7 0x7794a8b8 DispatchMessageA in user32 (0x7d7c956c)
  8 0x1c3022f8 SendCommonCmd@16 in mixmanusbcontroller (0x7d7c95c4)
  9 0x77b6b0ee in kernel32 (+0x5b0ee) (0x7d7c969c)
  10 0x77ee5b7d in ntdll (+0x35b7d) (0x7d7c9eec)
  11 0xb7f5da28 pthread_start_thread in libpthread.so.0 (0x7d7c9fec)
  12 0xb7ef20fa __clone in libc.so.6 (0x00000000)
0x778f4051: subl        $4,%esp
My version of wine is 20050524, and the program installed properly under wine, it just wont run. I put user32.exe in the C:\\windows\\system directory but that didn't work. What else do I need to do?