I think I rmember at least two messages on this list pointing out
that this is a FAQ.

Will you please start reading the documentation now? Start with the
FAQ section.

And btw if this is what you are pointing to http://www.denx.de/wiki/view/DULG/WarningBadCRCUsingDefaultEnvironment
then my exception is different ... on loading the image i am getting a CRC error not while loading u-boot.

Best Regards,
rohit