2296889 - BPC MS: Environment is no longer available after upgrade

After upgrading BPC MS, while loggig into BPC web no environment is available is loaded automatically nor selected.

SAP Business Planning and Consolidation 10, version for Microsoft platform

BPC MS, Environment is not available, upgrade. After upgrading BPC MS, while loggig into BPC web no environment is available is loaded automatically nor selected.  Modify the following parameter accordingly and save   <identity impersonate="true" /> impersonate SAP Business Planning and Consolidation 10,
While upgrading BPC IIS configuration has been altered and thus security is no longer in check with SQL resulting in queries parsed by IIS not accepted by SQL.  version for Microsoft platform , KBA , EPM-BPC-MS , Microsoft Version , Problem