Hi,
I loaded your tap file into Mach and it ran fine on my machine. I'm using version 2.065. I think you'll need to be a bit more specific as to what the problem is with this file.
As to the large dxf file with all the text, you didn't post it so I couldn't look at it. But, if I were to make a wild guess, you perhaps didn't wait long enough. I've seen people post this same problem with other CAM programs. Turned out the text contained so many entities, it took a very long time for the program to digest it.
Hope this helps,
Walt