[Serusers] SER behind NAT

Hi. I have a problem connecting to my SER server. Whenever i try to connect to it, i get the following dump in the SER server console. Can anyone tell me what's wrong? 0(2542) receive_msg: cleaning up 0(2542) SIP Request: 0(2542) method: <REGISTER> 0(2542) uri: <sip:192.168.0.50> 0(2542) version: <SIP/2.0> 0(2542) parse_headers: flags=1 0(2542) end of header reached, state=5 0(2542) parse_headers: Via found, flags=1 0(2542) parse_headers: this is the first via 0(2542) After parse_msg... 0(2542) preparing to run routing scripts... 0(2542) DEBUG : is_maxfwd_present: searching for max_forwards header 0(2542) parse_headers: flags=128 0(2542) DEBUG: is_maxfwd_present: value = 70 0(2542) parse_headers: flags=8 0(2542) DEBUG: add_param: tag=34a5cdda18b149aea3333cb92c50bc91 0(2542) DEBUG: add_param: epid=acbf1993e6 0(2542) end of header reached, state=29 0(2542) parse_headers: flags=256 0(2542) end of header reached, state=9 0(2542) DEBUG: get_hdr_field: <To> [31]; uri=[sip:PowerBlade@192.168.0.50] 0(2542) DEBUG: to body [<sip:PowerBlade@192.168.0.50> ] 0(2542) get_hdr_field: cseq <CSeq>: <1> <REGISTER> 0(2542) DEBUG: get_hdr_body : content_length=0 0(2542) found end of header 0(2542) find_first_route(): No Route headers found 0(2542) loose_route(): There is no Route HF 0(2542) check_self - checking if host==us: 12==12 && [192.168.0.50] == [192.168.0.50] 0(2542) check_self - checking if port 5060 matches port 5060 0(2542) parse_headers: flags=4096 0(2542) pre_auth(): Credentials with given realm not found 0(2542) build_auth_hf(): 'WWW-Authenticate: Digest realm="192.168.0.50", nonce="4145cb7f15b61c15276dd55d618a341155bd2de7" ' 0(2542) parse_headers: flags=-1 0(2542) check_via_address(62.243.128.27, 192.168.1.6, 0) 0(2542) DEBUG:destroy_avp_list: destroing list (nil)