What I have done is listed ...
1. Take a back up of Evolution to SDA
2. My other important files were already in SDA
3. Executed the following command. SDA is already mounted as home2.
# usermod -m -d /home2/emfex emfex
4. it creates the new home at sda. (It should also copy the files of old home to new home but it did not copy anything...!!! God knows why...!!!)
5. reboot the machine.
6. restore the evolution back up
7. Everything is working fine...
Thanks for all your supports and ideas....
You people are rocking... !!!