First, you might want to try refreshing the font cache of the fontconfig system: "fc-cache -fv".
Second, which directories is your X server loading its fonts from? Is /usr/share/X11/fonts/TTF included in the list?
Run "xset q" and read the "Font Path" part. You can add entries to the end of the font path with "xset fp+ <pathname>".
If the font path includes X font server specifications (like "unix/:7100"), you can use "fslsfonts -server <font server specification>" to see which fonts are offered by the font server. If your font server is "xfstt", you might need to stop the font server (service xfstt stop), then run "xfstt --sync" and restart the font server.