CorelDRAW X6 :: Can't Fill Imported Text

I have exported a file from a program called Aspire (used for CNC router modelling) in 3 formats. AI, EPS and DXF. Aspire is a vector program. The file is a bunch of text that I have carved into wood using the Aspire program output (toolpaths)

Now I want to import the file into CorelDraw to cut a vinyl outline of the text so I can place the vinyl over the timber and remove the cut letters and then spraypaint the letters that are cut into the timber. If I can cut the the vinyl exactly the same size as the router has cut the wood I can stick the vinyl over the wood and spraypaint into the grooves which saves a huge amount of time to make the sign.

However, what I need to be able to do is fill all the letters in Corel Draw and get rid of the outline pen in the file as the vinyl cutter software will cut the letters twice if I have the fill and the outline but it will not cut the outline by itself. So I need all the letters just to be filled (any colour is OK) to run the program that controls the vinyl cutter.

I have imported each file type into CorelDraw (one at a time)and and in each case have tried to fill the letters but I can't get CorelDraw to fill the letters properly. Say with letter "a" it will fill the vectors surrounding the letter but also fill the centre piece of the "a" and even if I select the centre piece of the "a" separately I cannot "unfill" that bit. I can change the centre piece to white and it look like its "unfilled" but that won't work with my vinyl cutter. It will not cut out the centre piece unless I can find a way to unfill the centre piece.

Same problem with all the letters that have a vector inside another closed vector (like p,q,e,g,o etc)