Transaction not working

Hey

I'm using using transactions in my code but it's not working when Rolling Back. Here is an example:

TransactionManager trans = DataRepository.Provider.CreateTransaction();

   try
   {
      // Update Entity1
      // Update Entity2

      // If I throw an exception here it should roolback the updates on Entity1 and Entity2 but it doesn't 
      throw new Exception("any exception");

      // Update Entity3

      trans.Commit();
   }
   catch (Exception ex)
   {
      trans.Rollback();
      throw new Exception(ex.Message);
   }
}
catch (Exception ex)
{
   throw new Exception(ex.Message);
}

 Does anyone know how to solve this?

Hey...

My bad... In the Updates I didn't put the trans object - Update(trans, entity).
It's working know!

Cheers