RTItem: Using JavaScript Control not work

Dear All,i have an 8.5.1 domino server.

So i have created a simple form with a RichTextItem called Body and set the Web Access display as “RTItem: Using JavaScript Control”.

But when i open the form on web (IE or Firefox) not work. The RtItem as showed as a simple TextArea item.

There are some other options to set on form or on server in order to use the new option display option Using JavaScript Control ?

thank you

D.

Subject: any suggestions ?

up ! can you help me or any suggestions ?