timeout after using Visual Editor

Hi all,

ASPRunner newbie here.

I have created an ASP runner (4.1) site which runs beautifully, but as soon as I go back to the Visual Editor to add some drop-down list functionality to some of my fields, the resulting ASP pages timeout.

There is very little data in the tables, so I know it's not timing out due to dragging down lots of data.

Can anyone suggest why this may be happening ?
Thanks