hi I use pa module to support SUBSCRIBE request which Event header is "presence", and the function I used in ser.cfg is as follow : if (method=="SUBSCRIBE") {    if (!t_newtran()) {        log(1, "newtran error\n");        sl_reply_error();     };     handle_subscription("registrar");     break; };

But the response of  this request is 400 error while parsing header Server: SIP Express Route (0.9.6(i386/linux)) I find there is no place in source code to parse Server header I am I miss something in ser.cfg or any other modules should be loaded ? Could any one tell me why?

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