Those tags are for a forum that uses BB tags like vBulletin. Those do not work here. At all.
FR uses straight-up HTML. Instead of [IMG], use the HTML tag like in post #3.
You can go to just about any HTML primer on the Internet, and most of what you learn there will work on FR.
Yes....I know I can type this stuff in myself, but it would be nice if I could find a way to cut & paste more quickly...