Oracle8 ODBC connection Problem

Hi Everyone, I am running WinNT Server with service pack4. I am using IIS4.0 as web server. The Oracle is Oracle8i on WinNT. I installed the latest PHP (v4.04) and it works fine with ODBC driver for Microsoft SQL7.0 and Access97 databases. However, I just can't get it right for Oracle8i. I tested the ODBC connection for Oracle with VB/ADO and it works fine. Here are the error messages I am getting when I run $connection_id = odbc_connect("OracleExample", "scott", "tiger"); Warning: SQL error: [Microsoft][ODBC driver for Oracle][Oracle]ORA-12154: TNS:could not resolve service name, SQL state 08001 in SQLConnect in I also tried Oracle ODBC driver and I am getting the following: Warning: SQL error: [Oracle][ODBC][Ora]Server rejected the connection., SQL state 08004 in SQLConnect I then tried $connection_id = ocilogon("scott", "tiger", "ora0.OFFICE"); I got the following: Warning: _oci_open_server: ORA-12154: TNS:could not resolve service name Again, I tested the service name with EasyConfig and SQLPlus. I also tested ODBC set up with VB/ADO and they all work fine. Can anyone tell me what went wrong? Thanks in advance. Ling Wang