Shareaza is open source.
And BTW, only because I've asked you a question, there is no need to become rude... Maybe I should ask differently: How is it not running? I mean, is it not connecting, not downloading or is the program not starting?
We might be able to make the program run for you, if you are more cooperative.
mfg,
Old
PS.: There are thousands of people who seem to be using gtk-g on ubuntu, so it is highly improbable that it doesn't run at all on ubuntu powered systems...