If you're using the SW CFB then you can only use G711. if you want to keep using G729 with SW CFB you need XCODER, or to use a HW CFB.
Depending on your configuration you might also have not allocated the necessary BW based on that "not enough BW" message, look at your location configurations and make sure enough BW is available.
HTH
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HTH
java
if this helps, please rate