[Serusers] sdp and rtp errors

Hi All I hope someone can help me with an issue I"ve had since installing ser. For some reason, whenever I call fix_nated_sdp or force_rtp_proxy I get the following errors Sep 19 10:31:06 localhost ser[3921]: Mon Sep 19 10:31:06 2005 18 a.b.c.d 62141 ****** Fixing NAT on reply with rtp Sep 19 10:31:06 localhost ser[3921]: ERROR: extract_body: message body has length zero Sep 19 10:31:06 localhost ser[3921]: ERROR: fix_nated_sdp: cannot extract body from msg! Sep 19 10:31:06 localhost ser[3921]: ERROR: extract_body: message body has length zero Sep 19 10:31:06 localhost ser[3921]: ERROR: force_rtp_proxy2: can't extract body from the message Sep 19 10:31:06 localhost ser[3921]: ERROR: on_reply processing failed Here is the part of the script that is generating the error onreply_route[1] { xlog("L_ALERT", "%Tf %mf ****** On Reply From: <%si> <%tu> <%fu> <%rm> <%rs> <%rr>\n"); if(status=~"[12][0-9][0-9]" && nat_uac_test("19")) { fix_nated_contact(); force_rport(); }; if(status=~"[12][0-9][0-9]" && nat_uac_test("19") && src_port>=10000) { xlog("L_ALERT", "%Tf %mf %si %sp ****** Fixing NAT on reply with rtp\n"); fix_nated_sdp("3"); force_rtp_proxy(); } else if(status=~"[12][0-9][0-9]" && nat_uac_test("19")) { xlog("L_ALERT", "%Tf %mf %si %sp ****** Fixing NAT on reply with sdp\n"); fix_nated_sdp("3"); }; } Any help would be appreciated. Thanks Rick