Enterprise Library June 2005 - DAAB Encryption Problem

[Jules]

I'm trying to encrypt my dataConfiguration.config using Enterprise
Library config util. I set up my File Key Algorithm Storage Provider
to create a key file using RijndaelManaged algorithm and using key
generated by EL wizard - config file is encrypted fine - key looks
fine - as soon as my app code hits a point where it needs to decrypt
the config in order to get the connection string, I get the following
error message:

The KeyAlgorithmPair could not be loaded from storage.


[InvalidOperationException: The KeyAlgorithmPair could not be loaded
from storage.]

Microsoft.Practices.EnterpriseLibrary.Configuration.ConfigurationProtector.SetDataToBeEncrypted(ConfigurationContext
context)

Microsoft.Practices.EnterpriseLibrary.Configuration.ConfigurationProtector.Load(ConfigurationContext
context, String sectionName)

Microsoft.Practices.EnterpriseLibrary.Configuration.RuntimeConfigurationView.GetConfigurationProtector(String
sectionName)

Microsoft.Practices.EnterpriseLibrary.Configuration.Storage.XmlFileStorageProvider.LoadXmlFile(String
fileName)

Microsoft.Practices.EnterpriseLibrary.Configuration.Storage.XmlFileStorageProvider.Read()

Microsoft.Practices.EnterpriseLibrary.Configuration.ConfigurationBuilder.ReadConfiguration(String
sectionName)

Microsoft.Practices.EnterpriseLibrary.Configuration.ConfigurationContext.GetConfiguration(String
sectionName)

Microsoft.Practices.EnterpriseLibrary.Data.DatabaseConfigurationView.GetDatabaseSettings()

Microsoft.Practices.EnterpriseLibrary.Data.DatabaseConfigurationView.GetDatabaseProviderData(String
instanceName)

Microsoft.Practices.EnterpriseLibrary.Data.DatabaseProviderFactory.GetConfigurationType(String
instanceName)

Microsoft.Practices.EnterpriseLibrary.Configuration.ConfigurationFactory.CreateInstance(String
configurationName)

Microsoft.Practices.EnterpriseLibrary.Data.DatabaseProviderFactory.CreateDatabase(String
instanceName)

Microsoft.Practices.EnterpriseLibrary.Data.DatabaseFactory.CreateDatabase(String
instanceName)
Ctd.Petrol.BusinessObjects.DataAccess.DataAccessBase..cctor() in c:
\vss\library\ctd\apps\petrol\source\ctd.petrol.businessobjects
\dataaccess\dataaccessbase.cs:12

Any help much appreciated.