Installing and upgrading help

Hi Everyone!

Want to run Moodle on a hosting companies Linux box, Apache as a Virtual Server

I am trying to install via Terrapin FTP from my home machine which is a Win2K SP2 box with IE 6 / (IIS)

When I try to run the index.php in the Admin directory via the browser to start the setup process, I get

Fatal error: Call to undefined function: odbc_pconnect() in /home/domains/2learn-homeopathy.co.uk/user/htdocs/moodle/lib/adodb/drivers/adodb-odbc.inc.php on line 116


Hopefully relevant information:
Part of my config.php is as follows
_________________________________________________
// First, you need to configure the database where all Moodle data
// will be stored. This database must already have been created
// and a username/password created to access it. See doc/INSTALL.

$CFG->dbtype = "Access"; // eg mysql (postgres7, oracle, access etc coming soon)
$CFG->dbhost = "localhost"; // eg localhost
$CFG->dbname = "moodle"; // eg moodle
$CFG->dbuser = "*******";
$CFG->dbpass = "******";


// Next you need to tell Moodle where it is located.
// Specify the full URL that moodle has been installed in:

$CFG->wwwroot = "http://www.2learn-homeopathy.co.uk/moodle";


// and now the full OS directory path to this same location:

$CFG->dirroot = "/home/domains/2learn-homeopathy.co.uk/user/htdocs/moodle";


// Now you need a place where Moodle can save uploaded files. This directory
// should be writeable by the web server user (usually 'nobody' or 'apache'),
// but it should not be accessible directly via the web.

$CFG->dataroot = "/home/domains/2learn-homeopathy.co.uk/user/private/moodledata";
________________________________________________


I have defined a blank Access database with appropriate User and Password and placed it in an hopefully appropriate directory. Is that enough? Do I need to create a blank Access database with all the relevant tables, primary keys etc?

We are not able to use MySql due to expense at present.

Any ideas would be gratefully received as I am an end-user rather than a techie and am "Drowning, not waving!!"

Many Thanks