The game was built for Win16 and does not have a 32bit header.
You are SOL in that respect. You may be able to get a patch for the header.
Try and contact the manufacturor about the problem. If you just bought the game NEW, they may have a true 32 version of the game that they will send you. If not, try to return it back to the store.
The store may throw a fit about opend S/W, however, stick to your guns that it will not run on XP.
IF you bought it used, good luck.