Hi Rama,
Thanks for your reply.
I have already tried to remove the xml files from mime repository and importing manually from PC as well as I removed it and started the customization a fresh. Nothing seems to be working.
I am attaching two screenshots:
1. Chart Designer (http://oi60.tinypic.com/5js21t.jpg)
2. Browser Display screenshot (http://oi62.tinypic.com/21kk03n.jpg)
The changes are getting reflected in Chart Designer. However, Not reflected in Browser(Run-time).
Looking forward to some input from you.