Nobody/Anonymous - 2006-10-26

Hi,
I have only just downloaded and installed the Scrolling Game Development kit (ver 1.4.6) and I am currently going through the tutorial. When I go to draw my map in the map editor it flickers and is really only showing the top 4 tiles worth of the map. It appears to scroll ok within these 4 rows but it does make it rather difficult to draw my maps.

Does anyone know what may be causing this and how to fix it.