I cant drag and drop controls on to the form!

hi

I have installed a fresh copy of VS 2008 after formating my PC, ealier i used VS 2005 for ASP. However, when open new web project and tried to drag and drop server controls to the form but i couldn't. When i click the control and drag it to the form it shows a black stop sign on my mouse cursor.... How do i fix this?

Some one told me to check the "change position to absolte for controls..." in Options --> HTML Designer --> CSS Styling even after that the same problem exsit..
cheers