save and upload images through webcam in web application

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C#

How to save and upload images through webcam in web application.Please help.I hv tried this code,working on local machine but after hosting,its not saving the image at server:

System.Drawing.Image originalimg;
string strFile = DateTime.Now.ToString("dd_MMM_yymmss") + ".jpg";

FileStream log = new FileStream(Server.MapPath(strFile), FileMode.OpenOrCreate);

byte[] buffer = new byte[1024];
int c;
while ((c = Request.InputStream.Read(buffer, 0, buffer.Length)) > 0)
{
log.Write(buffer, 0, c);
}
originalimg = System.Drawing.Image.FromStream(log);
originalimg = originalimg.GetThumbnailImage(320, 240, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);
originalimg.Save(Server.MapPath("Images") + "\\" + strFile);
//originalimg.Save( "D:\\WebcamImages\\" + strFile);
//Write jpg filename to be picked up by regex and displayed on flash html page.
log.Close();
originalimg.Dispose();
File.Delete(Server.MapPath(strFile));
Response.Write("../Images/" + strFile);
Session["ImgUrl"] = "../Images/" + strFile;
Response.Redirect("PhotoCapture.aspx");