[Serusers] Gransteam 486, auth digest on ser.

i have ser running with db auth. i have 3 users. 1-asterisk 1-x-lite client 1-grandstream 486. now the asterisk and x-lite client register with no problems. but the grandsteam 486 fails everytime. here's the error from the grandstream 14(15417) receive_msg: cleaning up 9(15406) SIP Request: 9(15406) method: <REGISTER> 9(15406) uri: <sip:*.*.*.*> 9(15406) version: <SIP/2.0> 9(15406) parse_headers: flags=1 9(15406) Found param type 232, <branch> = <z9hG4bK2dfa9e7d29a2dac4>; state=16 9(15406) end of header reached, state=5 9(15406) parse_headers: Via found, flags=1 9(15406) parse_headers: this is the first via 9(15406) After parse_msg... 9(15406) preparing to run routing scripts... 9(15406) DEBUG : is_maxfwd_present: searching for max_forwards header 9(15406) parse_headers: flags=128 9(15406) end of header reached, state=9 9(15406) DEBUG: get_hdr_field: <To> [26]; uri=[sip:60005@*.*.*.*] 9(15406) DEBUG: to body [<sip:60005@*.*.*.*> ] 9(15406) get_hdr_field: cseq <CSeq>: <100> <REGISTER> 9(15406) DEBUG: is_maxfwd_present: value = 70 9(15406) DEBUG: add_param: tag=bc875e4c67b6e1a6 9(15406) end of header reached, state=29 9(15406) parse_headers: flags=256 9(15406) DEBUG: get_hdr_body : content_length=0 9(15406) found end of header 9(15406) find_first_route(): No Route headers found 9(15406) loose_route(): There is no Route HF 9(15406) check_self - checking if host==us: 12==9 && [*.*.*.*] == [127.0.0.1] 9(15406) check_self - checking if port 5060 matches port 5060 9(15406) check_self - checking if host==us: 12==12 && [*.*.*.*] == [*.*.*.*] 9(15406) check_self - checking if port 5060 matches port 5060 9(15406) parse_headers: flags=4096 9(15406) pre_auth(): Credentials with given realm not found 9(15406) build_auth_hf(): 'WWW-Authenticate: Digest realm="mydomain.com", nonce="411790fae9ff2d7739f5e19e3f8b5b675e82c1b7" ' 9(15406) parse_headers: flags=-1 9(15406) check_via_address(*.*.*.*, *.*.*.*, 0) 9(15406) DEBUG:destroy_avp_list: destroing list (nil) 9(15406) receive_msg: cleaning up does anyone have any ideas ? Sean