Visual Studio 2010工具箱控件禁用或无效

I am trying to fix this from last two 2 or 3 days but failed. VS 2010 toolbox in asp application development(design mode or source) is not showing all controls(showing html and reporting ones), i can see all by right click(show all) but they are greyed out or inactive. Have used devnev.exe in VS command line to reset , have reinstalled VS, have deleted the four hidden files in I am trying to fix this from last two 2 or 3 da