>I have made my base classes on line of examples provided in Tastrade application in MSDN. The problem is in the association of ToolBars with forms. They come properly with the form also get released for the first time. But after that whenever I call any form, the system gives me an error of "ACTIVEFORM is not an object" and loads the form & ToolBar.

Abishek,
It's saying there is no activeform. Make a check before using activeform :

if vartype(_screen.Activeform)='O' and !isnull(_screen.Activeform)

Cetin