problems in connecting Access database

Hello, I know this may be a stupid question, but I've looked everywhere for help and since I could not resolve the problem myself, I am asking your help. The problem is simple: i have an Access 2000 database (Windows 2000, IIS5.0) that i want to query it using php4.06. I've added the database at the ODBC driver, the path to it is okay, but when I try to run the simple thing like: $conn = odbc_connect( 'test' , ' ', ' ' ); where test is the name of that database, then the output is smth. like Warning: SQL error: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified, SQL state IM002 in SQLConnect in c:\inetpub\wwwroot\test.php on line 11 Does anybody have any idea why this thing is happening and how I can solve the problems? Thanks! Mihai