Please explain what you mean by Foreground tool.
I have been using Illie pretty much since she hatched and haven’t heard of it yet.
Illie isn’t like Photoshop – there is no Foreground/Background colour and certainly no Foreground tool.
When I select a foreground colour and then use the brush tool, as soon as I start to draw, the foreground color changes to having no color selected. I am trying out this new tutorial I found online: http://http://vectology.com/tutorials/create-a-set-of-spooky-ghost-bru shes-in-adobe-illustrator/
the problem is that whenever I start to draw, the inner colour dissaperars, and all I am left with is the outline.
Like I said there IS no such thing as a Foreground colour.
I think you must be referring to the Fill and Stroke selector at the bottom of the Toolbox (which somewhat resembles Photoshop’s Foreground/Background colour in the interface).
Before you start using a Brush you must define the brush and its colour in the Brushes panel.
There are at least 6 different brushes or brush types within Illustrator. Some will allow a fill color, others do not. The blob Brush does not support fill color, only stroke color.
It would be helpful if you describe what you are doing more clearly. I don't want to have to sit through a video and guess at what point your issue may be located.