An error occurred while attempting to resize this image

[warrior]

I get this error when I try to upload I´m new about this so howe can I fix this ??

An error occurred while attempting to resize this image. If the problem persists, please notify the webmaster

Error Code: 4
"convert" -size 100x33 -geometry 100x33 -quality 100

http://forum.tanakawebb.com/gallery

and where can I change so I can upload gif.jpg picturer when I do that this error I get an un known file type ??
I cant upload that

[rbl]

That error means that ImageMagick was not found.
Seems you have set IM as the resize program. What have you set as the path? Are you sure it is correct?