It's initially there but when when the javascript real time code runs to update it, it references a non-existent file (ajax-images/wr-NW.png). The initial page code references "/ajax-images/wr-NNE.gif", so it looks like you have a mismatch between the PHP and javascript as to whether you are using gif or png images. It looks like the variable "wrType" in ajaxWDwx.js is the culprit (set at line 74).