IE cannot show my updated program!

Does anyone have any suggestions on how to solve following problem?
I am running a tomcat program with database, and using IE as an interface.
I have run this program before, and the text is too large with wrong
description, so I change it, but when I run this program again, the text
does not change, even through I have checked the JSP script with no error,
the IE still show the previous version of JSP results.
Does anyone have any suggestions?
Thanks in advance for any suggestions
Eric