[Serusers] search in ser.conf - unknown command ??

[jimmy huang]

Hi all:
I am trying nathelper module
refer to (http://www.informatik.uni-bremen.de/~prelle/terena/cookbook/main/ch04s07.html)

but when run ser , it say unknown command , missing load module?
and the error is 

if (method == "REGISTER" || ! search("^Record-Route:")) {

and each line when use "search" , always says it has errors

can anyone give me any idea what was wrong ?
thanks

jimmy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20040423/b6516051/attachment.htm>