i am not getting the debug toolbar of visual web developer. i can't start the program

[Hellodear]

hi guys,
I am using 'visual web developer 2005 inorder to develop asp .net web application, but one thing happened recent day.. i am not getting the debug toolbar gets active. i don't know what is the reason. The toolbar contains start, break all, stop debugging, restart etc; all are crucial for the web development:'(

i even tried the shortcut 'ctrl+F5'. But it also doesn't working. what should i do?
Your information is kindly solicited..