Need help with auto-detect feature when creating a form with fields.

I am attempting to create a form with fillable fields. Prior versions of Adobe would suggest an auto-detection option (though a dialog box that appeared) which saved quite a bit of time. My current version of Adobe (Acrobat X Pro) does not seem to have this feature. Any suggestions would be appreciated. It is way too time consuming to add each field one by one. Is it possible that I somehow have this feature turned off? I have attempted it with multiple documents with the same result.

Thank you for your time.

Liz