PHP Error with Hot Lightbox

Just paid for and installed Hot Lightbox on a local WAMP Joomla 3.0 environment.

I created a module using Hot Ligntbox.

I get these errors when I go to the page where the lightbox is supposed to be appearing.

Warning: imagecreatetruecolor() expects parameter 2 to be long, string given in C:\wamp\www\PRTC\JOOMLA\SITE\modules\mod_hot_lightbox\tmpl\default.php on line 107

Warning: imagecopyresampled() expects parameter 1 to be resource, null given in C:\wamp\www\PRTC\JOOMLA\SITE\modules\mod_hot_lightbox\tmpl\default.php on line 109

Anything I can do?

I think I figured out what I was doing wrong. I put 'auto' for the Thumbnail width. When I put a number in there, the gallery worked.