[PHP - MSSQL]: Problem with mssql_connect

Please help!... I have to use 'apache+php' connect to MSSQL Server 2000 in Windows Server 2003, but there are problem. Computer A: Windows Server 2003 Enterprise, MSSQL Server 2000 Enterprise, Computer B: Windows XP Professional, Apache, php ( Web Server ) Computer A <------ network -----> Computer B I try to write php script such this.. mssql_connect('server','sa','xxxx'); but the result is: ***message: Login failed for user 'sa'. Reason: Not associated with a trusted SQL Server connection. (severity 14) in ...*** Please help me find out the problem.. m(_ _)m and sorry for my english language, + + + + + + + + + + + + + + + + + + + [the thing that I did]... 1. I install client part from MSSQL Server CD Installer into Computer B already and I'm sure for ntwdblib.dll or php_mssql.dll is newest version that I can find.. 2. I set Authentication in MSSQL Server to be 'SQL Server and Windows' already + + + + [ but the problem still happen ] + +