Articles doesn't show rich text template variable

Hi,

I've created a TV that has the input type 'rich text' and is assigned to several 'normal' templates and the ArticlesContainer template.
On normal templates, I get the fill Rich Text editor (TinyMCE), but on the ArticlesContainer template I only get a small textarea with a couple of buttons on the bottom. I really need this to be the full TinyMCE, as this TV is used as full content area for the side column. It also has an additional template button...

It might be something simple, but I can't figure it out. Please help!

Thanks in advance,
Maurice.

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