Adobe Reader 9 - There was a problem connecting to the server

Hi there,

I have developed a form which submits XML via http(s).  It all works 100% in Reader 7 and 8, but I get the following error in Reader 9 - "An error occurred during the submit process. There was an error connecting to the server."  It doesn't seem to be a problem with my Javascript as I tried the vanilla http submit button in Designer and I get the same error.

Thanks!