Unable to use Drag'N'Drop

Do you mean you are trying to edit your form using the drag'n'drop function? Or?

Which form are you trying to achieve this on? 

I checked your account but you currently have no forms.

What browser|browser version are you using?

Were you trying to use it to create a form perhaps?

Please let us know so that we can help you more if necessary.

I would additionally recommend clearing your browser cache then try again.