SysRq on Libretto L2?

Does anyone know how to hit the sysrq key combination on the Toshiba Libretto L2?

I have a japanese 106 keyboard with US layout, and the "SysRq" key is labeled as the Fn-Del (hold the Fn key and hit delete). This means, I suppose, that I have to hit alt-function-sysrq-whatever, which doesn't seem to work.

Ideas?

Eric Altendorf    //    http://www.speedtoys.com/~eric