Anyone knows why?

I am doing a small application using VB .NET
First I created a windows application
Then I created windows control library
Then I build the control library
Then I add project reference to the control library from windows application
When I try to put the control on the windows application I got following (attached)error.

I then try the same procedure on a different machine and it worked..

In my computer I may have a incorrect setting or something.

Anyone knows why?

Janaka

I have been trying to make this work in my computer for last couple of days.
And it simply does not work..
I tried the same process in 2 other computers and it worked.

But if I put dll reference instead of project reference in my machine it works fine.

I really need to figure it out soon.