display image in web using

I use :      image.Save("c:\\drawline2.gif",System.Drawing.Imaging.ImageFormat.Gif);
               Image1.ImageUrl="c:\\drawline2.gif";
               image.Dispose();
               g.Dispose();

to finish  .gif   save,but by another computer connection,I can't display this .gif document,I know it is because image.Save() happen some problem,I don't know how to write code to resolve it!Thank you!