I've installed ELMAH 1.1 .Net 3.5 x64 in my ASP.NET project and now I'm getting this error (whenever I try to see any page):
  Could not load file or assembly
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.
  
  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
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.
More error details at the bottom.
My Active Solution platform is "Any CPU" and I'm running on a x64 Windows 7 on an x64, of course, processor. The reason why we are using this version of ELMAH is because 1.0 .Net 3.5 (x86, which is the only platform for which it's compiled) gave us this same error on our x64 Windows server.
I've tried compiling for x86 and x64 and I get the same error. I've tried removing the all compiler output (bin and obj). Finally I've made a reference to the SQLite dll directly, something that was not needed for the project to work on the server and I've got this compiler error:
  Error 1 Warning as Error: Assembly generation -- Referenced assembly 'System.Data.SQLite.dll' targets a different processor MyProject
Any ideas what the problem might be?
More error details:
  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.
  
  Stack Trace:
  
  [BadImageFormatException: Could not
  load file or assembly
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.]
  System.Reflection.Assembly._nLoad(AssemblyName
  fileName, String codeBase, Evidence
  assemblySecurity, Assembly
  locationHint, StackCrawlMark&
  stackMark, Boolean
  throwOnFileNotFound, Boolean
  forIntrospection) +0
  System.Reflection.Assembly.nLoad(AssemblyName
  fileName, String codeBase, Evidence
  assemblySecurity, Assembly
  locationHint, StackCrawlMark&
  stackMark, Boolean
  throwOnFileNotFound, Boolean
  forIntrospection) +43
  System.Reflection.Assembly.InternalLoad(AssemblyName
  assemblyRef, Evidence
  assemblySecurity, StackCrawlMark&
  stackMark, Boolean forIntrospection)
  +127    System.Reflection.Assembly.InternalLoad(String
  assemblyString, Evidence
  assemblySecurity, StackCrawlMark&
  stackMark, Boolean forIntrospection)
  +142    System.Reflection.Assembly.Load(String
  assemblyString) +28
  System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
  assemblyName, Boolean starDirective)
  +46
  
  [ConfigurationErrorsException: Could
  not load file or assembly
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.]
  System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
  assemblyName, Boolean starDirective)
  +613    System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
  +203    System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo
  ai) +105
  System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection
  compConfig) +178
  System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath
  configPath, Boolean
  supportLocalization, String
  outputAssemblyName) +54
  System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean
  isPrecompiledApp) +232
  System.Web.Compilation.BuildManager.CompileGlobalAsax()
  +52    System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled()
  +337
  
  [HttpException (0x80004005): Could not
  load file or assembly
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.]
  System.Web.Compilation.BuildManager.ReportTopLevelCompilationException()
  +58    System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled()
  +512    System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager
  appManager, IApplicationHost appHost,
  IConfigMapPathFactory
  configMapPathFactory,
  HostingEnvironmentParameters
  hostingParameters) +729
  
  [HttpException (0x80004005): Could not
  load file or assembly
  'System.Data.SQLite, Version=1.0.61.0,
  Culture=neutral,
  PublicKeyToken=db937bc2d44ff139' or
  one of its dependencies. An attempt
  was made to load a program with an
  incorrect format.]
  System.Web.HttpRuntime.FirstRequestInit(HttpContext
  context) +8896783
  System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext
  context) +85
  System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest
  wr) +259