Failed to connect to a DI Server Instance

hi, i am fresher to Pentaho-di. My issue is when i try to connect repository by Tools->Repository->connect i get an Error "Failed to connect to a DI Server Instance. Please check your server connection information and make sure your server is running." When I edit my repository and test it, it says
Repository URL is not correct. Caused by: Failed to access the WSDL at: http://localhost:8080/pentaho-di/web...epository?wsdl.
It failed with: Got http://localhost:8080/pentaho-di/web...epository?wsdl while opening stream from http://localhost:8080/pentaho-di/web...epository?wsdl.
Your earliest response will be highly appreciated.