thanks
actually i was migrating my application from
tomcat 5.x to tomcat 6.x and i was getting the offending classes error but i wasn't able to pinpoint the position than because it was to urgent i got the solution to put the loader property in context.xml and i done that.
Now i know what i did but didn't understood why that was happening that way.
[ January 28, 2008: Message edited by: subodh gupta ]