imports statement failing .NET (VB) from EntireX Sample Libr

Have VB6 ACI server(s) running in production, now need to create .NET (VB) ACI Server program. Trying to work with SAG provided Net ACI example BrokerServer, but I can’t get “Imports SoftwareAG.EntireX.Aci” to resolve. Looking thru .vbproj it looks like it references \SoftwareAG.EntireX.dll. If this is correct, I can’t find the .dll on my PC. Can anyone help me? ( .NET RPC Wrapper working, need ACI)
EntireX Communicator (Installed EntireX Runtime, EntireX Management Tools, EntireX Developer Tools & EntireX DCOM components).
VB .Net 2008 (Express Edition) .Net Framework V3.5 SP1 or
Visual Studio .Net 2002 (v7.0.9955) .Net Framework V1.0
Windows XP

The ACI component was introduced with the v7.3 release. It is not in the v7.2 release.