Hi Guys, I have an application build in C#, for saving sms, MMS and contacts from the mobile attached via data cable. i am able to save sms and contacts but it gives an error of invalid parameters, my code for saving is

 if (iRet == PCCSErrors.CONA_OK)
                {
                    dataVersit = (CAContentAccess.CADataDefinitions.CA_DATA_VERSIT)Marshal.PtrToStructure(bufData, typeof(CAContentAccess.CADataDefinitions.CA_DATA_VERSIT));
                    byte[] bVersitObject = new byte[dataVersit.iDataLength];

                    Marshal.Copy(dataVersit.pbVersitObject, bVersitObject, 0, dataVersit.iDataLength);
                    System.IO.Stream ios = System.IO.File.Open(fileDlg.FileName, System.IO.FileMode.Create);
                    ios.Write(bVersitObject, bVersitObject.GetLowerBound(0), dataVersit.iDataLength); 
                    ios.Flush();
                    ios.Close();
                }
                else
                {
                    PCCAPIUtils.ShowErrorMessage("CAReadItem", iRet);
                }