Failed to generate a user instance of sql server due to failure in starting the process for the user instance. The connection will be closed.

dear all,

i have visual web developer express on my system. the system is with windos 7 professional 64bit. i am developing a project and each time i try to create database, i get this error :

Failed to generate a user instance of sql server due to failure in starting the process for the user instance. The connection will be closed.

i can open SQL datababe outside the application but to add it or open it withing the application, the error pumps out.

this is seriously giving me issues. i have gone to google the error and yet still not be able to resolve it. I will appreciate if anyone can help.

thanks,

Victor