Garbled/breakup voicemail issue

I am having an issue with the asterisk voicemail operator and regular voicemails are either garbled, or the voicemail or operator voices breakup. I’m not sure why. My default format for both voicemails and operator voice are wav format. At the time I was initially setting up and testing the asterisk VM I was not running any CPU intensive tasks.

My System:

-AMD Athlon 64™ Dual Core 2.8Ghz
-4Gig of DDR2 Ram
-OS Ubuntu 8.10 w/ Kernel Version 2.6.27-14-generic
-Asterisk version 1.4.22
-Running FreeBX 2.5.1.5
-120gig hdd

Below is voicemail.conf

; website to fix voicemail permissions issue
; trixbox.org/forums/trixbox-f … problem-11

[default]
format=wav
1001 => 5101,First Extension,myemail@gmail.com,attach=yes|saycid=yes|envelope=no|delete=no

Any suggestions or help is appreciated.

As an added test, I watched both “top” and FreePBX System Statistics and CPU utilization never topped past 1-7%

Memory utilization never topped past 9%.