Can someone please enlighten me? Can text exist in DXF files - surely it must be able to

I've drawn up the attached chart as an Autocad 2012 drawing then saved it as a DXF file, as DXF is one format that I can import into my Laser Engraver software (RDWorks V8)
The lines come in fine, but the text is dropped. I've tried saving in each variant of DXF that Autocad gives as options, but the results are always the same. I can re-generate the text within RD Works but to do so is a pain as it isn't as easy to get things aligned

... any help would be appreciated
NB the 'TXT' file is a re-named DXF to get it uploaded