Related ToWord Com DLL

Hi,

           ihave developed one Word File through Office.word COM .dll file and i  am succeed in  to create a word file through ASP.NET usinf office.core.interop.word ...  my problem is when i am runnig the web site through visual studio then it works fine but when i am making the virtual directory of that project then the object of That word file is generated but at the time of file opening it gives error.....
any suggestion would be appericiated..