imagecreatefromstring(file_get_contents($url)) failing… help!

I’m having problems with accessing the PNG from this url:
[url]http://199.104.104.118/slc/projects/anomalies/Forecast/GEFS/archive/20100223/00z/gefs_00z_250hgtanom_f00.png[/url]

for use with
[B]imagecreatefromstring(file_get_contents($url))[/B]
or
[B]imagecreatefrompng($url)[/B]

I want to take the image here, use the commands above, then evaluate the colors pixel by pixel of a certain region. This script works if I have a local copy of the image. You could say, why don’t you just copy the image to a local directory first? I would, but file_get_contents/curl returns [B]null[/B] data. It’s as if the file is empty anytime I try to do anything other than display it. <img src=$url> works, but nothing else does. Ideas?

Thanks

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