You can only upload .jpg or .png grapics to Bizniz.co.za.  If your graphic is .gif or any other media, use this free handy tool that captures graphics from your screen and change is to whatever format you need.  We've been using this nifty program for a few years and cannot go without it. It's called MW Snap

Download  it here

You may experience problems with files that are too big.
If the server times out on uploading your picture (on slower connections), try to reduce the size of the graphic.