exif_thumbnail() problems

Ok, I recently recompiled PHP with GD and exif support. Now, I wanted to test exif_thumbnail() so created an jpeg image which had an embedded thumbnail. I used the exif_thumbnail() example at the php.net website, but it returns errors. The first error I get is an incorrect parameter count when I use exif_thumbnail($file, $x, $y, $type); I stripped off the height, width and file_type paremeters and that gets rid of that error. But no matter what I do, this function returns false telling me that there is no thumbnail to be retrieved from the image. Can anyone provide me with a working example of thumbnail extraction using exif_thumbnail()? I've tried many different things, with absolutely no luck. I tried using imagecreatefromjpeg() but that tells me theres no such function. Yours truly, Hrd