How to solve blur images in a website?

hihi… im using the photo gallery in my flash website…
but i’ve got some problem such tat when my pics are loaded it seems very blur and stretched…
how do i solve this ?

i saw some thread abt converting it into vector, but how is it possible in my case ? as the pictures are loaded directly from the folder without even importing into my library?

does tat mean i have to edit it in photoshop ?
any help will be greatly appreciated =)