Hello everyone.  I am new to XNA and new to the forums.  I have been reading through the forums looking at the issues related to XML deserialization, or more specifically the following error:

Error    1    The "BuildContent" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load file or assembly 'DBRealmPipeline, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'DBRealmPipeline, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
   at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
   at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.Load(String assemblyString)
   at System.UnitySerializationHolder.GetRealObject(StreamingContext context)

   at Microsoft.Xna.Framework.Content.Pipeline.WorkerAppDomain.RemoteProxy.LoadAssemblies(String[] searchAssemblies, String[] dependencies)
   at Microsoft.Xna.Framework.Content.Pipeline.Tasks.BuildContent.Execute()
   at Microsoft.Build.BuildEngine.TaskEngine.ExecuteInstantiatedTask(EngineProxy engineProxy, ItemBucket bucket, TaskExecutionMode howToExecuteTask, ITask task, Boolean& taskResult)

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].
    DBRealm

I am going through the tutorial to isolate the tile engine from the RPG starter kit.  I am to the section named "Hooking it up", but when I go to build the game project, i get the error above.  If I remove the content, the game project will build.  I have not been able to decipher the previous posts to figure out what is going on here.  Can some one offer yet another answer to this for me?

I am using XNA 3.1.

Thanks..