Issue with /bin - CookComputing.XmlRpcV2

I have been receiving this error now 3 times after shutting down my computer when everything appears to be running correctly with my web app (running off of Umbraco). I have a blog running off of a package called articulate...it always used to work.

I seem to have a running website on localhost, and then all of a sudden when I came back a day later (after shutting down the computer and restarting), I receive the following error. I have gotten around this error before by deleting the /bin and then doing a clean and rebuilt in visual studio, however, this doesn't seem to be a solution.

I have the CookComputing.XmlRpcV2 file in the /bin folder ... I don't know what is happening here.

Could not load all types from "Articulate, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

STACK TRACE:

[ReflectionTypeLoadException: Could not load all types from "Articulate, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping:
. System.IO.FileLoadException: Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
]
   Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) +496
   Umbraco.Core.TypeFinder.GetClassesWithBaseType(Type baseType, IEnumerable`1 assemblies, Boolean onlyConcreteClasses, Func`2 additionalFilter) +289
   Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable`1 assemblies, Boolean onlyConcreteClasses) +62
   Umbraco.Core.<>c__DisplayClass51_0`1.<ResolveTypes>b__1() +29
   Umbraco.Core.PluginManager.ResolveTypesInternalLocked(Type baseType, Type attributeType, Func`1 finder, Boolean cache) +1130
   Umbraco.Core.PluginManager.ResolveTypesInternal(Type baseType, Type attributeType, Func`1 finder, Boolean cache) +151
   Umbraco.Core.PluginManager.ResolveTypes(Boolean cache, IEnumerable`1 specificAssemblies) +326
   Umbraco.Core.CoreBootManager.InitializeApplicationEventsResolver() +58
   Umbraco.Core.CoreBootManager.Initialize() +604
   Umbraco.Web.WebBootManager.Initialize() +16
   Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e) +194
   Umbraco.Core.UmbracoApplicationBase.Application_Start(Object sender, EventArgs e) +34

[HttpException (0x80004005): Could not load all types from "Articulate, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping:
. System.IO.FileLoadException: Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +10062145
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Could not load all types from "Articulate, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping:
. System.IO.FileLoadException: Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +10043436
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +95
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254