Attaching .jpg

I am having some weird problems loading .jpg files with loadMovie().

1.I download an image off the net to put in my movieClip.

2.Depending on the individual jpg, some will display and some will not(also I get no file not found errors).

3.Furthermore, lets say one displays. If I go to resize it in photoshop and then run the flash movie again it may or may not display.

I am !&#*in’ confused.