CRM 2011 - Plugin assembly using ILMerge on Managed and Unmanaged Code

Hi,

I am creating a Plugin assembly which is using unmanged DLL. I have used ILMerge tool to merge both assemblies into single assembly and register assemly using Plugin registration tool.

However I get exception when plugin code gets executed as System.TypeLoadException: Bad unmanaged code entry point. Is unmanged dll supported in CRM 2011? Any help is appreciated

>Web Service Plug-in failed in SdkMessageProcessingStepId: {612724DF-8D12-E311-94DE-005056AB01C7}; EntityName: sandisk_rma_system; Stage: 30; MessageName: Create; AssemblyName: Microsoft.Crm.Extensibility.InternalOperationPlugin, Microsoft.Crm.ObjectModel, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35; ClassName: Microsoft.Crm.Extensibility.InternalOperationPlugin; Exception: Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
   at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Web.Services.Protocols.LogicalMethodInfo.Invoke(Object target, Object[] values)
   at Microsoft.Crm.Extensibility.InternalOperationPlugin.Execute(IServiceProvider serviceProvider)
   at Microsoft.Crm.Extensibility.V5PluginProxyStep.ExecuteInternal(PipelineExecutionContext context)
   at Microsoft.Crm.Extensibility.VersionedPluginProxyStepBase.Execute(PipelineExecutionContext context)
Inner Exception: System.TypeLoadException: Bad unmanaged code entry point.

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