[Kamailio-Users] dialog problem

Hi, I am trying to use get_profile_size in the dialog module. but copy and paste from the kamailio 1.5.0 module http://kamailio.org/docs/modules/1.5.x/dialog.html#id2531307 get_profile_size("caller","$fu"); xlog("currently, the user %fu has $avp(size) active outgoing calls\n"); doesn't work at all. then finally decide to use pv.so and got following setting: modparam("dialog", "dlg_flag", 4) modparam("pv", "varset", "size=i:44") get_profile_size("caller","$fu", "$shv(size)"); but even this doesn't work either: Apr 17 22:56:33 sip1m01 /usr/sbin/kamailio[7201]: ERROR:core:fix_actions: fixing failed (code=-6) at cfg line 373 Apr 17 22:56:33 sip1m01 /usr/sbin/kamailio[7201]: ERROR:core:main: failed to fix configuration with err code -6 can anybody tell me how to call this properly ? Jinsong