getting an error "your cpu doesn't support long mode. use a 32 bit distribution"

[gulyani]

I have  virtual machine already installed with redhat linux which was given to me by one of my friends.

When I start that virtual machine on VM Player of my machine.

It throws an error says "Your cpu doesn't support long mode. use a 32 bit distribution"

My system has XP-64bit edition installed on it.

Please help me.. thanks in advance...