VB.NET error while adding a reference (.tlb)

I am Trying to add business object reference "busobj.tlb" to my project. This tool was created in VB6 and recently we have started migration to VB.NET.

I tried adding the reference from project>Properties>References but it pops out a message saying "A reference to busobj.tlb could not be added,make sure that the file is accessible,and that is a validAssembly or a com component."

I am using Visual studio 2008 .Net framework开发者_JAVA百科 3.5.

These references are for .Net assemblies only. Your vb6 .tlb won't work, at least via this mechanism.