Quote Originally Posted by deepak_abc
... I have installed the MBR in Linux partition...
It looks as if what you may actually have done was to choose installation of the Boot Loader into the Partition instead of into the MBR.
This would work if you have an independent boot manager to put in the MBR e.g. SmartBootManager or GAG Boot Manager (you could find these free downloads on the Web ).

However if all you are going to put on the machine is the Knoppix and Windows it would probably be most convenient to re-install Knoppix, this time choosing to install the Boot Loader into the MBR. The installer should detect your Windows and put it in the boot-up menu for you