Ok actually looked into the problem and it's common with the stand alone version.

Reading the main thread it suggests the server is having issues with the
'file_get_contents' or Curl related stuff. Not being too hot on php I am unsure what to suggest, as I do not know any alternative methods for retieving a url.. Itemstats uses the same method, does that fail on your server?
... will look into it some more when I get some time.
It looks like a server configuration error as opposed to an addon issue.

I don't use ItemStats, but i'm going to install and give it a try.

hey, thanks for porting this, it works great. My guildies find this addon insanely useful. I added the "check bank" functionality in this thread in case anyone else wants it for the port.