The following error is received when the K2 Extensions are not available. Typically you will have Aviva.Aces.K2.dll in the GAC but placing this assembly in the Web App bin will solve the problem as well.
Server was unable to process request. ---> Could not load file or assembly 'Aviva.Aces.K2, Version=3.0.0.0, Culture=neutral, PublicKeyToken=07d235519ac1ab9a' or one of its dependencies. The system cannot find the file specified. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Neudesic.Aces.AcesService.AcesService.SaveSoxDocument(String soxsite, String library, String filename, String contents)
at Neudesic.Aces.ComponentViewer.saveSoxDocument()
at Neudesic.Aces.ComponentViewer.Page_Load(Object sender, EventArgs e)
at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)