I apologize for the confusion of ending up in the wrong forum, the "Fill & Sign" panel in Adobe Reader XI is different from the "Adobe Fill & Sign" website.
I am guessing you are using Adobe Reader XI and that was how you found this forum. Is that right? Are you using Adobe Reader XI?
After clicking "File" are you choosing "Send File..."? If so which method do you choose next?
Anyhow, I can keep asking questions and do my best to figure it out but will also point you to two forums you should be able to the best help for this question:
Adobe Reader forums: Adobe Reader
Adobe Acrobat Forms Forums: PDF Forms
Thanks,
Josh