oleview could able create instance but cocreateinstance fails.

[rsandeepu]

Hi, I could able to create instance of the com server using oleview. But when i do the same thing in code with cocreateinstance it gives the error E_NOINTERFACE or 0x80004002. By breaking cocreate instance if found that Queryinterface return this error. How could i resolve it? Please help many thanks in advance.