Activation context generation failed for "e:\app\raja\product\11.2.0\dbhome_1\bin\ORACLE.EXE.Manifest".Error in manifest or policy file "e:\app\raja\product\11.2.0\dbhome_1\bin\ORACLE.EXE.Manifest" on line 0. Invalid Xml syntax.

above error message to try to start the oracle 11g database?pls help on that