Dolphin Emu doesn't work on Ubuntu

[galsuejo]

Dear all,

an new on this, I have listen that a Wii emu soft is available and I have installed in my computer.

just few details, I have an Acer Aspire win Intel dual core 2 and ATI radeon graphics, running with ubuntu 10.04.
I have included PPA for Dolphin EMu, and I have installed as a normal software from the catalogue, seems that everything works fine until I execute an ISO, then, it keeps in blank screen (the one for the game) during hours.
finally, I have force the exit of dolphin and never has runned.

what I am doing wrong?

thanks in advance for your support.