Enable Quick search in synaptic manager

Some times the quick search in synaptic manager of debian derived linux distros disabled. So, how to enable it..

Step 1:
Check whether the apt-xapian-index package is installed or not using

#sudo dpkg -l | grep apt-xapian*

a) Installed already then follow step 2
b) If not installed already then install the package with following command

#sudo apt-get install apt-xapian-index

Step 2:
Now issue the following command
#sudo update-apt-xapian-index -vf

Step 3:
Now open/run the synaptic manager application.

:)