I got "Out of memory" exception when load an ".ico" file use System.Drawing.Image.FromFile,

Image.FromFile(sFilePath, true);

but don't get any exception when load a ".jpg" file, and there are same permission settings for these files. I found a post which said the exception caused by it doesn't have sufficient permission. :(

And I still got "Paramter is not vaild" exception when load the ico use Image.FromStream.

FileStream fs = new FileStream(sFilePath, FileMode.Open, FileAccess.Read);
Image img = Image.FromStream(fs, true, true);

I'm confused, the codes seem work on another PC. :(

Who knows what am i doing wrong?