My Virtuemart search plugin is not working

[jaiprasad54]

Hi,

    I am working on vm 2.0.0 stable and i have to edit virtuemart search plugin(i.e in plugins/search/virtuemart/virtumart.php) for my needs.
  I try editing the code nothing is working out. i have given echo and print_r statement for testing it works or not. still it is not showing anything.

   I have checked in Adminsection the plugin is activated.

  Can anyone help me out on this problem