.ps won't change to .pdf

I saved pages off of Adobe PageMaker 7.0 in .ps to .pdf in Acrobat Distiller 7.0, but it keeps erroring.

I have XP and I'm on a school computer, so I can't get into Control Panel to reinstall it, or I would have already.

%%[ Error: rangecheck; OffendingCommand: imageDistiller; ErrorInfo: Decode --nostringval-- ]%%

Stack:
-dict-
-mark-

%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
%%[ Warning: PostScript error. No PDF file produced. ] %%