HELP! jpegs all screwed up

[Skyeg]

i just tryed uploading some jpegs to mpix to get them printed (i need them by thursday) and when i look at them on their site it is just a bunch of horizontal black and white lines. on my computer they open fine the only thing is that on the thumbnail there is a small black line on the left side. what should i do? i still have all the raws and tiffs.

thanks,
skye

 

[Skyeg]

actualy it might not be my photos, i jsut tryed ezprints.com and it worked fine. does anyone know what their quality would be like for 20x30 black and white prints?