Is the gd library compiled into your version of php? You can check this my calling the ever handy phpinfo() function. Does the GD library appear, you should get something like this:
Code:
gd
GD Support enabled
GD Version bundled (2.0.28 compatible)
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.1.9
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XPM Support enabled
XBM Support enabled
only it will be in a "pretty format".
graeme.