my application take snapshots using webcam and save them in a local folder. so i'm using following code to convert my Silverlight Snapshot to a byte array and send it through the Web Service. name of my web service is ImageService.\[code\]ImageServiceSoapClient client = new ImageServiceSoapClient();private void source_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e) { WriteableBitmap bmp = new WriteableBitmap(320, 240); bmp = e.Result; byte[] buffer = bmp.ToByteArray(); client.SaveImageToLocalAsync(buffer, txtUserName.Text); }\[/code\]and this is my server side code..\[code\][WebMethod] public string SaveImageToLocal(byte[] buffer,string name) { try { Bitmap bmp = new Bitmap(320, 240); using (MemoryStream stream = new MemoryStream(buffer)) { bmp = new Bitmap(stream); string saveString = GetFolder() + name + ".jpg"; bmp.Save(saveString, System.Drawing.Imaging.ImageFormat.Jpeg); } return "Servers says : Saved..!!"; } catch (Exception ex) { return "Server says : " + ex.Message; } }\[/code\]so when i run this application, i'm getting an exception saying "Server says : Parameter is not valid"..can anyone please tell me what's wrong with this code? i spent weeks to solve this problem. please help... 
thanks...
thanks...