Search service application

Question

When  i am creating New Content Source for my application search service application is in Error.please help me Most of your answers supported me to resolve the issues

 

I Followed the below steps but it is not resolved

 

1.Change the app pool of the search service to "SharePoint Web Services Default". in the properties of the search service.
CA-->Manage Service Applications-->Select "Search Service Application"

2.in the ribbon control choose "Properties".
then change the below both service’s app pool to "SharePoint Web Services Default"

App Pool For Search Admin Web Service,
Application Pool for Search Query and Site Settings Web Service