DO can't start. Why?

I'm using DO and so far so good until today. My DO won't start. Try uninstalling doesn't help. I have the popup message "THE INSTALLSHIELD ENGINE (IKERNEL.EXE) COULD NOT BE LAUNCHED. THE RPC SERVER IS UNAVAILABLE".

Anybody please help me. Thx.

This is only a guess on my part, but were you using an evaluation copy of DOpus? If so, perhaps the evaluation period expired.