I want to hide the black border of the document in the thinweb component (WEB), this one:

http://s27.postimg.org/5gr35m8r7/nevron_documentborder.png

I tried with the following advice (from the knowledge base)

http://support.nevron.com/KB/a197/hide-or-change-the-border-of-a-diagram-drawing-document.aspx

But it didn't disappear... can you help me?