Sigh.

Can anyone recommend a soldering iron that, er, works.

I have a small customer computer cable that I need to solder to an RS232
DE-9. (i.e. 4 small wires onto a mounting block.)

I've got a Antex 16-18w iron that I got from Maplin a couple of years
back, but rarely used. It doesn't even melt the flippin solder when I
try to tin the tip.

So, any recommendations for a decent iron?