mssql_connect() - Unable to connect to server

Hi all, I´ve seen some coments on the subject already, but I couldn´t put it to work. My set up is: Php 4.3.3 under Win - MSSQL 2000 - Win 2000 server - IIS 5.0. All in the same server. php_mssql.dll is set as an extension, ntwdblib.dll is in the system32 directory. My call to mssql_connect is: mssql_connect("'MY_IP_ADRESS', 'user', ''"); (the password is empty). The Warning message: "Warning: MS SQL: Unable to connect to server:" .... Did I forget anything? Is there something I have to do in the SQL Server? I am not used to MS SQL Server, but I added a user with read and write privileges. Is there something else? Tks Felipe --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.528 / Virus Database: 324 - Release Date: 16/10/2003