You mean you finish the installation and then when you try to open the application it does nothing, or maybe that the installation itself doesn't complete?

Did you dld the right version corresponding to your OS?

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-