In my first touch with XACT everything worked more than great(Assuming its biggener's luck)

now i'm trying to put the same audio files in an XACT project but when i play them it sometimes gives me an error telling me "an existing connection was forcibly closed by host" and then another error "Connection to auditing server has been lost" or it just hangs and gives an error so i close it.

even my old project isn't working it tells me that the cue name is incorrect.

trying adding the old project in my game it tells me an error at content processing

"Error 1 Building content threw KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at Microsoft.Xna.Framework.Content.Pipeline.Tasks.BuildXactCoordinator.CheckDependencies()
   at Microsoft.Xna.Framework.Content.Pipeline.Tasks.BuildXactCoordinator.Build(ITaskItem xapItem, String xapPath, String xapName) Sound2"

So any fix for this thing?

and another question why all this mysteries about sound why not just making it as simple as mdx?