Migration from OmniHttpd to Apache+PHP HELP Urgent!?!?!?

I have Win NT4.0/SP3 with OmniHttpd as my Web Server for S/W dev. project. It's about Web-Base MS Access Database with ODBC and it's run properly. Recently I decided to use Apache instead. So I remove Omni and install Apache, then PHP. After that I move my program to Apache folder and run. I Found many error that cause from "odbc_connect", the error is about this Warning: SQL error: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified, SQL state IM002 in SQLConnect in c:\program files\apache group\apache\htdocs\test\odbc.php on line 6 I have try to install MySQL and it's work!!! with mysql_connect there is no further problem. But when I use it via ODBC (MyODBC) it's generate as same as error as mention above. Help meeee!!! As soon as possible, Thanks.