Urgent: Unable to run JSP pages(using JRun Custom Tags) in Weblogic 5.1

Hi,
I am using JRun Custom tags to bulid JSP pages.
Could not run the jsp page on Weblogic 5.1.
I could run the same on JRun Server but not on Weblogic?.
Had placed JRuntags.jar in the web_inf directory.
What/where i need to update in properties file?.
Please reply..
Best Wishes.
Satish k.Yalamaddi.

javax.servlet.ServletException: com/sun/tools/javac/Main (Unsupported major.minor version 49.0)
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here the problem is you are trying to run a code that was compiled using j2sdk1.5 in j2sdk1.4

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