I was uploading a couple pictures I took with the digital camera. I was able to upload some but now I get this error???

Error creating thumbnail! Error code: 1
Command: /usr/bin/X11/mogrify -format JPG -quality 80 -geometry 125x94 /home/tamparacing.com/www/htdocs/gallery/data/500/9076IMAG0827-thumb.JPG


All the pictures are the same size, 100kb roughly.... all Jpeg as well