Snapfish guestbook help!

Has anyone here made their guestbook or another photograph book through snapfish? I have started to make my guestbook, but every time I put pictures into the book it says the pictures are low resolution. I don't know how to fix this to make the pictures look good. I have a very good camera, so I know its not the quality of the picture. I don't know if it is because they enlarge the pictures or something, but I don't want the pictures to be blurry or anything.

Thanks for any help! I'm getting a little frustrated with this lol!

we used snapfish...

make sure that when you uploaded your photos you used the Hi-Res upload. there are a few upload options, so you have to be careful.