Problem with data table adapter and binding it to a objectdata source

Bit of a strange one this. I had it working fine the other day and now I'm unable to configure it.

Basically, I create a dataset in Visual Web Developer 2005 Express Ed using the data adapter configuration wizard. That bit works fine. Next I drag a data grid to my webpage and use the smart tag to create a new datsource. I then select an object and hit ok. This is where the problem occurs, my data table adapter does not appear in the dropdown. I can get the name of my dataset to appear if I untick 'Show only data components' but if I select this and go to the next screen of the wizard my methods aren't available. Any ideas Like I said this worked fine yesterday so I've no idea what's happened.