Changing margins in word 2003

I dont no if anyone can help but I have the following problem. I work in a college and as part of an exam some of the students have to change the margin settings in word by going to file-page setup etc. The problem I have is that they get the following message "settings you chose for left and right margins, column spacing, or paragraph indebts are too large for the page width in some sections" All you get then is either show help, which is no help, or ok, which does not action the changes. If I log on as administratator I can action the change however, the students accounts are set to power user security and it does not work for them.The office ver is 2003 fully patched up running on windows xppro machines again fully patched up, attached to a hp 2420 laserprinter. Obviously I can not give them admin level access can anyone offer any help. I have searched the net for two days now with out success.