Physical verification system menu is not working properly

HI All,

Recently physical verification system tool is installed and integrated to virtuoso but the menu options are not working. when i am trying to use any option i am getting the following error  

   _pvsOpenIPVSrunform( 'erc ?timeout 30)'

  _pvsOpenIPVSrunform( 'drc ?timeout 30)'

PVS Version: PVS 15.22-s262-64b
Virtuoso: IC6.1.7-64b.500.7

these are the versions of tools i am using.  Can anyone tell me how to solve this?

Regards

Anand