g729 license doesn' t load

I hav 4 Digium licenses bought from digium site. I registered them and it worked fine the day i registered i.e. when i typed “show g729” on asterisk cli, it came back with 4 licenses 0 used

All of a sudden when i stop and started asterisk, it stopped loading g729 licenses. The license keys are there but not read. How can I diagnose this issue and make asterisk load the g729 codecs?

I have asterisk 1.4.2 .

I have sent numerous emails to digium support but no replies :frowning:(

Can anyone help??