[Serusers] can't register

[Serge Kravchenko]

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 at sip.sipuser.com>
To: <sip:krav at sip.sipuser.com>;tag=53d3b67acb7f1aa5eed7d0549c34647b.dea0
Call-ID: 77FCCA606A8111D7B7A2000021F0A5BA at 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.

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