As David says, some Canon guns won't work with a regular optical slave. They fire once, then lock up. I thought the TypeII guns were okay for this, but someone on here recently had trouble. You need a special optical slave, like the Sonia slave (from Flash Zebra) which is modified for the job.
However, both the Canon ringflash and macro lights work as masters to control the remote 430 with wireless E-TTL, so that is a sorted way forward.
But, there's no way you will be able to do much with either of those at 4-5m range. Nowhere near enough power. You'd be better off with the RayFlash for that, preferably powered by a 580EX gun. That is also good for macro and, with a 580 on board as a master that too will control a remote 430 gun.