Ya this a known issue with some versions of adobe software.
Solution:
Step 1: Open PageMaker 6.5 and then open your file/document (legal size).
Step 2: Go to START --->Printers and Faxes.
Step 3 : Select your printer and right click on it and then select printing preferences.
Step 4 : Select Paper/Quatity tab and then select LEGAL from the Size drop-down list.
Step 5: Apply and close.
Step 6: Return to PageMaker 6.5 and then print as always.
This should workout.