I always find it's not a good idea to run cheap sound and video based programs before DarkBASIC - They tend to leave DirectDraw running open (which DB needs big time) and/or DirectShow/WMP/whatever is used to actually decode the AVI files. I find I can sometimes fix this by running the program again, running Windows Media Player, closing the program then closing Windows Media Player.
Check your startup area of your computer - Startup Manager is a free utility that does this well - for these programs.
An orange can't be a tomato but a tomato can be orange...