Midi System Not Responding


my system: g4 dual 867 tower, 1.25gb ram osx 10.3.9

I am having a problem with the utility audio/midi setup crashing---because of this reason and cubase are unable to load.
I was having this problem recently, but I erased and clean installed everything on my hd. Now the problem is occurring again.

I have run the repair permissions, and first aid from the system disk, and I repaired the disk with disk warrior.
The midi system is still not responding (timeout occurs). If I try to load the audio/midi setup by itself, it crashes.

Is there any way i can either repair or replace that particular folder/app, without reinstalling my entire computer?

thank you for help!
dave jones