Most basic question on Interactive Fill Tool.

I am pretty new to CorelDraw. I do not use it much. I have a series of squares and want to color each one a different color. I am unable to fill at all any color. I created 2 tables and over lapped them and deleted some lines. I can say use the square tool and fill with a color but I cannot do this with the table I created.

Question: What can I do to fix this?  
I only created a table to create the squares. There must be a better way to do the layout    : )

Image of file

Link to cdr file