Padding is invalid and cannot be removed

   Hi Guys,
Devforce Version : 6.1.7
Platform : Silverlight

Getting the subject error while trying to deploy a BOS to IIS 7.0. Here's the scenario;

Our silverlight app has two EntityManagers, one will be remote (stored on clients own IIS server). We have specified the following in the App.Config;

<ideablade.configuration version="6.00" xmlns="http://schemas.ideablade.com/2010/IdeaBladeConfig">
    <logging logFile="log\DebugLog7.xml" />
    <objectServer remoteBaseURL="http://localhost" serverPort="9100" serviceName="EntityService.svc">
      <serviceKeys>
        <serviceKey name="GTPAC" remoteBaseURL="http://testserver" serverPort="81" serviceName="GTPACBOS/EntityService.svc/sl" />
      </serviceKeys>
      <clientSettings isDistributed="true" />
    </objectServer>
  </ideablade.configuration>

The underlying Entity Manager is created using the following;

return new GTPACEntities(new EntityManagerContext(true, null, EntityServiceOption.UseDistributedService, null, null, serviceKey: _userContext.TenantDetails.SERVICE_KEY));

I notice that as soon as this Manager is created, it shares the same SessionKey and IPrinicpal as the main app Entity Manager (created first), this I find strange considering I don't link it to the first manager and I implement a second Login Manager on the remote BOS which doesn't seem to be resolving. The login itself seems to succeed, but as soon as I try to query the manager for an Entity, the below Padding error occurs..

The debug log on the remote BOS is as follows;

2012-05-28 12:46:29  IdeaBlade.EntityModel.Server.SessionManager:GetLoginManager Anonymous access: disabled 
2012-05-28 12:46:29  IdeaBlade.Core.Composition.CompositionHost:GetImportDefSingle CompositionContext: '-IbDefault-' - Probed for non-default 'IEntityLoginManager' and found 'GTPaC.LoginManager'. 
2012-05-28 12:46:29  IdeaBlade.Core.Composition.CompositionHost:CheckMultiExport CompositionContext: '-IbDefault-' - Probed for non-default 'IKnownTypeProvider' and found no matching exports. 
2012-05-28 12:46:29  IdeaBlade.EntityModel.Server.EntityServerHost:<AddBehaviors>b__2 Using DC serializer for EntityServer 
2012-05-28 12:46:29  IdeaBlade.EntityModel.Server.EntityServerHostFactory:CreateServiceHost EntityServer listening on http://egtpac-trial:81/GTPACBOS/EntityServer.svc 
2012-05-28 12:46:29  IdeaBlade.EntityModel.Server.EntityServerHostFactory:CreateServiceHost EntityServer listening on http://egtpac-trial:81/GTPACBOS/EntityServer.svc/sl 
2012-05-28 12:46:30  IdeaBlade.EntityModel.EntityServerProxy:GetInstance Loaded IdeaBlade.EntityModel.EntityServerProxy 
2012-05-28 12:46:30  IdeaBlade.Core.Composition.CompositionHost:GetImportDefSingle CompositionContext: '-IbDefault-' - Probed for default 'IDataSourceKeyResolver' and found 'IdeaBlade.EntityModel.DefaultDataSourceKeyResolver'. 
2012-05-28 12:46:30  IdeaBlade.EntityModel.EntityMetadataStore:LoadMetadataFromEmbeddedResources No metadata resources found in 'GTPaC.ModelDF, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' 
2012-05-28 12:46:30  IdeaBlade.Core.Composition.CompositionHost:GetImportDefSingle CompositionContext: '-IbDefault-' - Probed for any 'EntityServerErrorInterceptor' and found 'IdeaBlade.EntityModel.Server.EntityServerErrorInterceptor'. 
2012-05-28 12:46:30  IdeaBlade.EntityModel.Server.EntityServerErrorHandler:ProvideFault Caught exception: System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed. at System.Security.Cryptography.CapiSymmetricAlgorithm.DepadBlock(Byte[] block, Int32 offset, Int32 count) at System.Security.Cryptography.CapiSymmetricAlgorithm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) at System.Security.Cryptography.CryptoStream.FlushFinalBlock() at System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing) at System.IO.Stream.Close() at IdeaBlade.Core.CryptoFns.AesDecrypt(String encryptedValue, Byte[] key, Boolean fipsCompliant) at IdeaBlade.EntityModel.Server.CredentialEncryptor.Decrypt(String encryptedCredential, String encryptionKey) at IdeaBlade.EntityModel.Server.SessionManager.GetPrincipalFromEncryptedCredential(SessionBundle sessionBundle) at IdeaBlade.EntityModel.Server.SessionManager.Validate(SessionBundle sessionBundle, Boolean loginIfNotInMap) at IdeaBlade.EntityModel.Server.EntityServer.Fetch(SessionBundle sessionBundle, IEntityQuerySurrogate surrogate) at SyncInvokeFetch(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet) 

It should be noted, that when I deploy to my local (development) IIS server, everything works fine, however, as soon as I try to deploy to the remote IIS server, the padding error occurs.

Any help GREATLY appreciated..

Thanks
Marcus