OH HELP! (real real sad)

i have an almost brand new macbook OSX 10.4.6 and when i tried to download LWbasic 4.12 i get stuck in this weird instilation loop! LimewireOSX.dmg downloads just fine to the desktop and the installation wizard opens automaticallly and installs normally, but where it should start the setup wizard, the only option is 'close'. A limewire icon appears on the desktop but when opened it is the installation wizard again, and LimeWireOSX.dmg wont open at all anymore. All i can do is install!
i looked all over this site and lime wire's and found several similar problems,
but none of the solutions worked for me.
i upgraded my java to the newest version and i configured my firewall correctly per the instrustions that "lord of the rings" posted. still the same.
Please help if you can!!!!!!
it would be much appreciated
and i am so sorry if i have overlooked the answer to this, or if i am being and idiot and it is real simple.