Updating a new site

I have had this site for a while and finally decided to make some changes to it. www.holidaygiftmall.info - and now it doesn't want to cooperate and let me add pictures or any graphics of any kind - uggh - This site is a sale site - all kinds of things that I have to sell, most are also listed on Ebay and/or Yardsellr. I just keep collecting things until I am about out of room.