Hello Iswarya,
Have you verified that you have the correct connection for your target configuration file? Go to View > Target Configuration, double click the target configuration file (extension .ccxml) then verify connection is set to "Spectrum Digital DSK-EVM-eZdsp onboard USB Emulator". If using an external emulator, then make sure you have it change this option to the JTAG emulator you are currently using.
I hope this helps. Please let us know if you have any questions.