makemdl newby problm

Hi all, I'm a novice in gmax, and after creating my first model I tryed to export it! I clicked export, export as a aricraft mdl, but then it gives me an error saying : "msxml4.dll could not be loaded. config files won't be readed", and after this it says: " makemdl was not found, or failed to convert the specified in c:\xx\xx\xx to a mdl file. check your system path to ensure makemdl is on it"!
so, can anybody help me??
so, can anybody help me??
