WTF - keep looking around on the forum. I have been successful 3x on my router with differen encryptions. I found helpful information everywhere - even ur thread.
I am having the same issues with it freezing and quiting. I am still trying to diagnose the problem but am not there yet. One thing i was able to come up with was to change the directory that the my ivs were saved to before running the collecting command. This was able to allow my computer to run long enough to capture a bunch of packets before it quit. By saving the ivs to a folder on my hard drive i was able to rescue them after my computer froze/re-booted to then run my cracking software on.
Not sure if this is clear - but hope it helps.