UE4 headaches

Hi,
after spending hours and hours trying and trying again, i hope you will find what's wrong...

I have a form which submit to himself, made using Form Builder. It works. The file will be included into another one and there is no problem with that.

The problem is that it is impossible to apply UE4. As soon as it is applied, i get a red warning and if try to re-enter UE4, it is all empty. If i try to submit the form, it only goes again to the first page with all the fields blank. Sometimes an email is received with only a "0" in it.

I have tried several of combinations : "Create a file for your email", "Edit", "DW Edit"..., float, block, ...

Sometimes files a created with an incremented suffix in the /webassist/email folder, sometimes there are not created at all, sometimes i get javascript errors...

So i finally erased /email content folder and other email template files automaticaly created and revert to my backup, tried again, and...here am i, tired of loosing so much time...

Another bug, not critical, but anoying ; the preview doesn't work anymore, it always show the same static image at this location : file:///C:/Users/esphera/AppData/Roaming/Adobe/Dreamweaver%20CS4/fr_FR/Configuration/WAUE_HTML.htm which does not update anymore....

I have attached the files

Regards