Service group deploy error

Hi, I am getting error while deploying the service group.

i.e Faulted: System.OperationCanceledException: AIF service group not activated.  Service group: ScribeAxWebService.  Error: Duplicate type with name 'Dynamics.Ax.Application.AxdProdBom' in assembly 'Dynamics.Ax.Application, Version=6.0.947.280, Culture=neutral, PublicKeyToken=null'. ---> System.BadImageFormatException: Duplicate type with name 'Dynamics.Ax.Application.AxdProdBom' in assembly 'Dynamics.Ax.Application, Version=6.0.947.280, Culture=neutral, PublicKeyToken=null'.

   at System.Signature.GetSignature(SignatureStruct& signature, Void* pCorSig, Int32 cCorSig, RuntimeFieldHandleInternal fieldHandle, IRuntimeMethodInfo methodHandle, RuntimeType declaringType)

   at System.Reflection.RuntimeMethodInfo.get_Signature()

   at System.Reflection.RuntimeMethodInfo.GetParameters()

   at System.ServiceModel.Description.ServiceReflector.ValidateParameterMetadata(MethodInfo methodInfo)

   at System.ServiceModel.Description.TypeLoader.CreateOperationDescriptions(ContractDescription contractDescription, ContractReflectionInfo reflectionInfo, Type contractToGetMethodsFrom, ContractDescription declaringContract, MessageDirection direction)

   at System.ServiceModel.Description.TypeLoader.CreateContractDescription(ServiceContractAttribute contractAttr, Type contractType, Type serviceType, ContractReflectionInfo& reflectionInfo, Object serviceImplementation)

   at System.ServiceModel.Description.TypeLoader.LoadContractDescriptionHelper(Type contractType, Type serviceType, Object serviceImplementation)

   at System.ServiceModel.Description.ContractDescription.GetContract(Type contractType, Type serviceType)

   at System.ServiceModel.ServiceHost.CreateDescription(IDictionary`2& implementedContracts)

   at System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses)

   at System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses)

   at Microsoft.Dynamics.Ax.Services.AxServiceHost..ctor(Type serviceType, String serviceGroupName, String portType, Boolean integrationEnabled, Boolean portDeployedToIIS, Boolean isXppService, ServiceElement serviceElement, Uri[] baseAddresses)

   at Microsoft.Dynamics.Ax.Services.AifHelper.PublishServices(String serviceGroupName)

   --- End of inner exception stack trace ---

   at Microsoft.Dynamics.Ax.Services.AifHelper.PublishServices(String serviceGroupName)

   at Microsoft.Dynamics.Ax.Services.AifHelper.PublishAllServiceGroups(Dictionary`2 faultedServices)

What could be the issue??

Thanks,