I installed symfony-standard edition.After some struggle with parameters.yml there was progress... the database_driver was set to pdo_mysqln and the running proceeded however there were 6 occurences of the same error in different php files .and the error was:
Unexpected error talking to the backend: An exception occurred while executing 'SELECT 1 FROM phpcr_workspaces WHERE name = ?' with params ["default"]:
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'sf_sandbox.phpcr_workspaces' doesn't exist
any ideas?