Здравствуйте! Подключил самописную сборку к проекту, на локальном компьютере при отладке все работает, а при попытке запуска через сервер IIS7 падает. В какую сторону можно смотреть?
Пишу на ASP.NET MVC 5, сборка сделана в 4.0
В какую сторону смотреть?

Ниже страница со стеком ошибки.

Server Error in '/' Application.
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Could not load file or assembly 'Common.ExcelHelper' or one of its dependencies. Была сделана попытка загрузить программу, имеющую неверный формат.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.BadImageFormatException: Could not load file or assembly 'Common.ExcelHelper' or one of its dependencies. Была сделана попытка загрузить программу, имеющую неверный формат.

Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Assembly Load Trace: The following information can be helpful to determine why the assembly 'Common.ExcelHelper' could not be loaded.

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Stack Trace:

[BadImageFormatException: Could not load file or assembly 'Common.ExcelHelper' or one of its dependencies. Была сделана попытка загрузить программу, имеющую неверный формат.]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +234
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) +108
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +25
System.Reflection.Assembly.Load(String assemblyString) +34
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +49

[ConfigurationErrorsException: Could not load file or assembly 'Common.ExcelHelper' or one of its dependencies. Была сделана попытка загрузить программу, имеющую неверный формат.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +772
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +259
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +163
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +230
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +76
System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +343
System.Web.Compilation.BuildManager.ExecutePreAppStart() +176
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +734

[HttpException (0x80004005): Could not load file or assembly 'Common.ExcelHelper' or one of its dependencies. Была сделана попытка загрузить программу, имеющую неверный формат.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +579
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +112
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +716

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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1087.0