[Plugin: NextGEN Gallery] HTTP error when uploading image

I just installed nextgen gallery, and everything worked fine until I try to upload a picture to the gallery I created. it gives me an error called:
ERROR HTTP error.: HTTP Error
I tried everything and just can’t get it to work.

http://i1098.photobucket.com/albums/g380/moddingmachine/Layer0.jpg

http://ww.wp.xz.cn/extend/plugins/nextgen-gallery/