Nope, no luck
I have uninstalled, reinstalled, deleted, deactivated and done everything short of a complete reformat and fresh install of W7. I have wasted a few activations of my other modules and the end result remains, DCSW simply will not accept my BS2 upgrade serial number. Which is copied and pasted directly from my email receipt from ED a mere 3 weeks ago. I have a support ticket into to ED for several days now and no response.
Apparently I will be forced to purchase the full version of BS2 in order to play it in DCSW!
Not to happy at this point.