[Lucene.Net] Could not load assembly

[Prescott Nasser]

While trying to set up a test for Contrib.IsolatedStorage, I'm running into an 
issue I haven't been able to solve.
 
{System.TypeLoadException: Could not load type 'Lucene.Net.Documents.Document' 
from assembly 'Lucene.Net, Version=2.9.4.2, Culture=neutral, 
PublicKeyToken=null'.
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at 
System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs
 e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, 
EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr 
unmanagedObjArgs, Int32 argsTypeIndex, String eventName)
}
 
I'm not sure why I'm getting this. When I call the IsolatedStorageDirectory 
constructor, that runs fine, but when I try to call something from the 
Lucene.Net core I'm running into this error.
 
Directory isoDir = new IsolatedStorageDirectory("//", null);
Document doc; //this line throws the error, the above runs fine.
 
I've cleared the GAC, made sure I've got the latest binaries referenced etc.
 
Any thoughts?
 
Thanks,
~Prescott