According to our records you are using a non-supported hardware configuration. It is unfortunate you have decided to criticize us when we are trying to help support you on hardware that is not designed for StreetDeck.
"I have a 600MHz ULV embedded processor, 2 GB ram, 128 MB Onboard Video, USB 2.0, 40 GB HD, etc. Custom made computer"
We are doing our best to solve this even though this is outside the range of what we support. There are many people successfully using the elmscan products on StreetDeck.
Perhaps you should try them elmscan on a laptop or other supported hardware as a troubleshooting step. Run StreetDeck in demo mode and try the proper com port.
Please report your findings in the post i mentioned before.