A new twist in the forms "submit" button problem

Through my efforts to add a SUBMIT button to my form, I've become familiar with the problems that can arise when trying to use this function, whether in InD or in Acrobat.  Since I'm primarily working in InDesigh, I'm posting this in the InD forum. Please bear with me as I try to explain how I got to where I am and the problem I'm having now.

• I first just followed instructions about creating a submit button. 
• The first time I tested the PDF (attempting to email to myself), the submit button brought up a window that offered to let me use either a default mail application OR web mail. My email address was visible also.
• I chose "default mail application" (I may have the wording inexact re that option).
• I choose to "continue" but got the error message that some recipients were unresolvable.
• I at first thought I'd typed my email incorrectly, but that wasn't the case.
• Naturally, I got online to try to find a solution. Instead I discovered this is a common problem.
• I went back to my InDesign form and tried a number of things -- different email addresses; typing the "mailto:" in the two different ways (most folks say "mailto:" but one post said to use "mailto://"). Nothing I tried made a difference. I still got the "unresolved recipient" error so many folks have seen.
• The next time I tried the submit button, I chose "web application," and though it was a few more steps than I hoped, it did work.  For whatever reason at that point, the "default mail application" choice was grayed out, so "web mail" was all I COULD select.
• Then I read about creating the button in Acrobat instead of InDesign, and I tried that.  I got pretty much the same results, but then I somehow triggered some kind of preference window, and "default mail application" was once again ungrayed and available to choose. (Like a fool) I chose it.
• With that default changed (and I do think this happened in Acrobat), I tried again to send, and I got the same "unresolved recipient again."
• Okay, I thought, web mail it is.  Only now, I no longer even get the "choice" window so that I can choose to go back to web mail.  I ONLY get the unresolved recipient error message, and I can find no way to get to that default choice window again.
• Just as an aside, I have tried deleting the buttons and creating new ones in both InD and Acrobat, but nothing changes. It's like the attributes I chose previously are hanging around and attaching themselves to the new buttons.  Even with brand new buttons, I can't get back to where I have an option to choose web mail again, which I would happily settle for at this point. At least it worked!

Sorry for the long-winded run-down, but I kind of had to think my way through it to explain it. Any help would be appreciated!  Thanks in advance!