DT Personal upgrading to DT/DN pro (infoworker pro?)

I entered my registration code for DT personal into the upgrade page and found that I can upgrade to DT Pro for $30 or Infoworker pro for $50. However, after I got to the next page, the link only show the upgrade to DT pro but not the infoworker pro pack. Any clue?

Could you please send us your license code and a few lines where exactly this happens to sales(at)devontechnologies.com? Thank you!