I am working with K2, the extention of Joomla 1.5, and it is renaming my pictures when I upload them to my website. This is hurting my Google Image results because the name of the picture is some crazy name:

<img src="cdn.advacarepharma.com/media/k2/items/cache/6f7af10029bcf59a35635b8213d55753_L.jpg" alt="Advacare Bandage China" style="width:270px;">

How can I stop K2/Joomla from doing this?

Thank you,
Bradley