I am sure i am doing something very basic wrongly.

Here is my config file snippet

$xavp(caller_peer[0]=>accountname) = "AAA";

xlog("L_WARN", "XAVP ACCOUNT NAME $xavp(caller_peer[0]=>accountname) \n");

No matter what i set this XAVP at, it always prints null in log file as below

WARNING: <script>: XAVP ACCOUNT NAME <null>

Please help how i can set XAVP and use it further in config file.