images wont resize

Hey there im trying to use the page builder to rebuild my home page, great concept btw.

i set my rows up and have images in them, but when i set to 300 x 300 or 640 x 640 and bound them and have them resize to fit container, certain images will resize others will go to original size.

im trying to have 2 images on a row then 3 on next row but i want them all the same size, any ideas why it wont change?

is there any css i can use to override this?

thanks