WAMPSERVER GD2 - doesn't support jpeg images?

I have WAMPSERVER 2.0 installed on my localhost with php_gd2 extension enabled, however when I'm trying to save a jpeg image I get this exception:开发者_JS百科

Your GD installation does not support JPG image types

How to enable JPG images?

You might want to look at the comments made by other developers on the PHP manual.

http://www.php.net/manual/en/function.imagecreatefromjpeg.php#74891

and

http://www.php.net/manual/en/function.imagecreatefromjpeg.php#70832

it is something to do with libjpeg