HRESULT E_FAIL error when doing batch geocoding in ArcObjects

Question

I am trying to write a batch geocoding application in ArcObjects/C# and keep getting the meaningless

"Error HRESULT E_FAIL has been returned from a call to a COM component"

error (error code -2147467259), and I can't figure out what's causing it.

Any tips on how to figure out what the error is? I am running ArcGIS 9.3.1 SP 2. Below is the code that I have. I get the error on the last line:

IRecordSet resultRecordSet = geocodeServer.GeocodeAddresses((IRecordSet)recordSetInit, addressProperties, null);

Here is the full code:

        IGeocodeServer geocodeServer = null;
        IGISServerConnection conn = null;
        conn = new GISServerConnection();
        conn.Connect("mandarin");
        IServerObjectManager som = conn.ServerObjectManager;

        IServerContext geocoderContext = som.CreateServerContext("StateCntyLoc", "GeocodeServer");
        geocodeServer = (IGeocodeServer)geocoderContext.ServerObject;
        IGeocodeServerObjects gom = (IGeocodeServerObjects)geocodeServer;

        IGeocodingProperties locProp = (IGeocodingProperties)gom.AddressLocator;
        locProp.SideOffset = 0;
        locProp.EndOffset = 0;

        IServerContext gdbContext = som.CreateServerContext("MF", "GeodataServer");
        IGeoDataServer geoDataServer = (IGeoDataServer)gdbContext.ServerObject;

        IGeoDataServerObjects gdsObjects = (IGeoDataServerObjects)geoDataServer;
        IWorkspace gdsWS = gdsObjects.DefaultWorkingWorkspace;
        IFeatureWorkspace featWS = (IFeatureWorkspace)gdsWS;

        ITable addressTable = featWS.OpenTable("FACT_CRASH_INPUT");
        IFields fields = geocodeServer.GetAddressFields();

        // The Address Field Mapping is key = Locator Field Names and value = RecordSet Field Names
        IPropertySet addressProperties = (IPropertySet)gdbContext.CreateObject("esriSystem.PropertySet");
        addressProperties.SetProperty(fields.get_Field(0).Name, "INTERSECTION");
        addressProperties.SetProperty(fields.get_Field(1).Name, "CNTY_CD");
        IRecordSetInit recordSetInit = (IRecordSetInit)gdbContext.CreateObject("esriGeodatabase.RecordSet");
        recordSetInit.SetSourceTable(addressTable, null);

        IRecordSet resultRecordSet = geocodeServer.GeocodeAddresses((IRecordSet)recordSetInit, addressProperties, null);

Now if I put the table in a file geodatabase on my local machine and do the batch geocoding against ArcGS Online, I get back a record set.

        IAoInitialize ao = new AoInitialize();
        ao.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcInfo);

        IGeocodeServer geocodeServer = null;
        IAGSServerConnection agsServerConnection = null;

        IPropertySet connectionProperties = new PropertySet();
        connectionProperties.SetProperty("Url", "http://tasks.arcgisonline.com/arcgis/services");

        IAGSServerConnectionFactory serverConnectionFactory = new AGSServerConnectionFactory();
        agsServerConnection = serverConnectionFactory.Open(connectionProperties, 0);

        IAGSEnumServerObjectName serverObjectNames = agsServerConnection.ServerObjectNames;
        serverObjectNames.Reset();

        IName name;
        IAGSServerObject serverObject = null;
        IAGSServerObjectName serverObjectName = serverObjectNames.Next();
        while (serverObjectName != null)
        {
            if (serverObjectName.Name == "Locators/TA_Address_NA" && serverObjectName.Type == "GeocodeServer")
            {
                name = serverObjectName as IName;
                serverObject = name.Open() as IAGSServerObject;
                if (serverObject as IGeocodeServer != null)
                {
                    geocodeServer = serverObject as IGeocodeServer;
                    break;
                }
            }
            serverObjectName = serverObjectNames.Next();
        }

        IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactory();
        IWorkspace workspace = workspaceFactory.OpenFromFile(@"C:\Users\marni\Desktop\TestGC.gdb", 0);
        IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;
        ITable addressTable = featureWorkspace.OpenTable("FACT_CRASH_INPUT");
        IFields fields = geocodeServer.GetAddressFields();

        // The Address Field Mapping is key = Locator Field Names and value = RecordSet Field Names
        IPropertySet addressProperties = new PropertySet();
        addressProperties.SetProperty(fields.get_Field(0).Name, "INTERSECTION");
        addressProperties.SetProperty(fields.get_Field(1).Name, "CITY_CD");
        addressProperties.SetProperty(fields.get_Field(2).Name, "CNTY_CD");
        addressProperties.SetProperty(fields.get_Field(3).Name, DBNull.Value);
        IRecordSetInit recordSetInit = (IRecordSetInit)new RecordSet();
        recordSetInit.SetSourceTable(addressTable, null);

        IRecordSet resultRecordSet = geocodeServer.GeocodeAddresses((IRecordSet)recordSetInit, addressProperties, null);