No, the problem is that you are assuming everyone is using Friendly URLs. We can't use Friendly URLs so when Reg Pro adds the ?ctlname=Step2 to the URL it's not formatted correctly.
Go to your DNN 'host settings' -> 'advanced settings' -> 'Friendly Url Settings'.
Now make sure '' is UNchecked.
Try it again. See what you get.
Check to enable search engine friendly urls.
If you need to have '' checked then we'll have to look for an alternative product elsewhere
Thanks for looking into this asap.
Craig
Check to enable search engine friendly urls.