Question about ODBC databases

I have a little problem. I must design a little system in a linux server, this should be in php. The system must read a MS Access DB in a remote server (Win NT). After a single process the system must update a MySQL DB in the same server (Linux) and the Access DB. The current code works fine in the Linux server, so i can update the MySQL DB, but it doesn't connect with the NT server. When i tried to connect to it i have the following error. Fatal error: Call to undefined function: odbc_connect() in /usr/local/etc/httpd/htdocs/vox/loginAccess.inc on line 14 I never developed with ODBC DB, only with MySQL. I was searching about what could be the problem, but i don't found it. The code in liginAccess is the following: $dbaccess = array(); $dbaccess["accessserver"] = "NT.server.ip.address"; // Access server hostname $dbaccess["accessport"] = ""; // Access server port $dbaccess["accessusername"] = "user"; // username $dbaccess["accesspassword"] = "password"; // password $dbaccess["defaultdb"] = "database"; // database $conexionAccess=odbc_connect($dbaccess["defaultdb"],$dbaccess["accessusername"],$dbaccesss["accesspassword"],""); In the code above i tried to inser the remote server address, port etc, and the error codee is the same I hope you cant help me. I don't who else can i ask for it. Thanks in advanced