[Users] how to use OpenSER

hi all i am explaining my problem i have installed openser on one of machine. i have assigned SIP_DOMAIN in that machine as "test.com". then i also added users to the openser using *openserctl add user1(a)test.com test user1(a)test.com* command. so that user is also added to the myslql database. till now it is ok. now i am using Minisip as a sip end application. in that i have given account name as user1(a)test.com, sip uri as sip:user1@test.com, sip proxy address as machine's ip address on which proxy is installed and network port as 5060. but it is not working.. can someone help me out.. thanx in advance. Brijesh