How to remove a dialogue with the placement of the signature in Acrobat XI

Hello

I have a problem. After upgrading to Acrobat Standard XI during the signing dialog still shows:

"To start the certification process, select the Create a new rectangle for signature and then drag to select the area where you want the certifying signature appeared. After marking the desired area to get the next step in the certification process. "

At the first signing I understand, but when our accounting so signed dozens of invoices per hour, the next step is clickable for her very annoying. I do not understand that there is no check box "Do not show".

More can be seen on this video: http://screenr.com/gCT7

Do not know if it can not be turned off somewhere? If a developer reads this, please add the option Do not show this dialog.

Thank you for every answer.

regards

Ales Ulrych