Can anyone help me please?

I'm confident with Access and have developed thousands of databases and applications over the past few years. However, my current project is to create a database on the internet to produce web-based forms etc.
The only websites i've created in the past, i have used Macromedia Dreamweaver which is a fairly easy to use application.

I need any information that you can give me on how to go about learning how to create an on-line database. Can you start me off or do you know of any online tutorials etc. ? Whether to use PHP, ASP, .NET, XML???

I'm an expert with access/vb/sql but a complete newbie to building websites!
Please help - i can't seem to find anything!