DC form won't allow ink signature

I recently downloaded Acrobat DC and a form that I had used before the upgrade always allowed me to easily drag and drop in an ink signature. Now that the form is opened in DC, the right hand column states, "You have opened a fillable PDF form. This form does not let you drag and drop saved information." Therefore, when I go to the FILL & SIGN option, it won't pull up options for adding an ink signature, only creating a Digital ID and using that. I want it to add the ink signature and I'm not sure what's wrong with the form. I've tried re-creating the form, but nothing helps. The form was originally created in InDesign CC. Any help would be appreciated. I did the acrobat DC fill and sign tutorial and that went fine, but my actual form won't work like the sample file form (Fill and sign forms anywhere | Adobe Acrobat DC tutorials). Thanks.