[Serusers] can't register

hello. i've been trying to register to ser with couple of UAs like x10, estara and snom100. the response is following: RECEIVE << ser_ip_address:5060 SIP/2.0 483 Too Many Hops Via: SIP/2.0/UDP my_ip_address:5060 From: <sip:krav@sip.sipuser.com> To: <sip:krav@sip.sipuser.com>;tag=53d3b67acb7f1aa5eed7d0549c34647b.dea0 Call-ID: 77FCCA606A8111D7B7A2000021F0A5BA(a)sip.sipuser.com CSeq: 1788 REGISTER Server: Sip EXpress router (0.8.10 (i386/freebsd)) Content-Length: 0 Warning: 392 212.58.142.4:5060 "Noisy feedback tells: pid=93155 req_src_ip=ser_ip_address in_uri=sip:sip.sipuser.com out_uri=sip:sip.sipuser.com via_cnt==12" mysql has been installed properly, and i can add subscribers using serctl...... i guess there's something wrong with script, which is default, i've just uncommented everything regarding auth and mysql. and following is what i get in ser box logs: May 12 09:08:57 sip ./ser[93190]: ERROR: parse_cseq: bad cseq May 12 09:08:57 sip ./ser[93190]: ERROR: get_hdr_field: bad cseq May 12 09:08:57 sip ./ser[93190]: ERROR: build_res_buf_from_sip_req: alas, parse_headers failed any suggestions please? thanks.