You should be able to drag n drop controls within HTML table as well as see them in the design view.
As far as the server table control is concerned ,you can add controls to the table in the source view and surely see them in the design view,but just cant add controls to the table server control in the design view itself.
By the way,which server control are you trying to add to the table(Server Control)?
The above is in reference to Visual Studio 2005.
Vikram.S, Developer
DiscountASP.NETInnovative ASP.NET Hosting & SQL Hosting