I can't see any on-page factors to explain it (eg you use keywords throughout page and in H1 and in title - they are the main important places)

Off-page - I checked your backlinks (one of them was from here at WPW!!!) - most of those I checked used Tools4webmaster.com rather than 'software with resell rights' as the anchor text (anchor text rules!!!) --- this may be an area you can work on.

Another thing you could try is to use internal anchor text back to the home page of 'software with resell rights home' rather than 'home' ... why don't you test this for us? - come back and report weekly on your rankings in this thread!!!

CBP