Although I'm not really sure what could be the problem, if ye want, ye could send me the files and I could export them for ye and send ye the exported file. Just upload the files to Dropbox or mediafire and send me the link via private message. I could then send ye the exported file.
It may be y'er FH acting up. Try resetting y'er computer or reinstalling FH to see if 'twill let ye export it correctly. {Do remember to make backup files before ye reinstall so ye don't lose any of y'er important files that ye may 'ave installed over time.}