load all scanner devices ?

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C#

hi really i need help in this
i typed this code to load all connected scanner device to acombobox
but it work in windows 7 in windows xp i got this noisy exception

Retrieving the COM class factory for component with CLSID {00020819-0000-0000-C000-000000000046} failed due to the following error: 80040154.

this is my code

public static void LoadScanners(ComboBox c)
       {
           MC.enableWIA();
           string deviceName = "";
           c.Items.Clear();

           WIA.DeviceManager deviceManager = new WIA.DeviceManagerClass();
           // Loop through the list of devices and add the name to the listbox

           foreach (WIA.DeviceInfo info in deviceManager.DeviceInfos )
           {
               if (info.Type == WIA.WiaDeviceType.ScannerDeviceType)
               {
                   foreach (WIA.Property p in info.Properties)
                   {
                       if (p.Name == "Name")
                       {
                           deviceName = ((WIA.IProperty)p).get_Value().ToString();
                           c.Items.Add(deviceName);
                       }
                   }
               }


           }
       }

exception occur at this line

WIA.DeviceManager deviceManager = new WIA.DeviceManagerClass();

plz i need any help