Automon Not working

I am using asterisk 1.4.14 i have automon activated on features.conf
Set DYNAMIC_FEATURES=automon, I have wW in my dial plan. The recordings are done perfectly for internal calls.

Its only on the external calls when i press *1, i can hear the beep and so am i getting files on my monitor directory but as soon as i hear that beep, my callee’s voice gets crappy. The call is active but I cant hear a thing that can be recognizable.

And after that my Asterisk starts to do funny stuff and the server freezes. I have to restart the machine to get back things working.

Any ideas on how to fix this weird stuff?