Logic's Dreaded "disc Too Slow" Error Message! Options

[ryanie]

I am running a 1.25 Ghz G4 power book with 1.25 gig of ram. I am running Logic 6.4.1 and I constantly get the "disc too slow" error message if I use more than 5 tracks of audio and an audio instrument. I have tried buying more ram, freeing up space on my hard drive, freezing files, changing buffer size.. everythng! From what I can gather from other fourums it's a pretty common problem and it does not seem to be a hardware problem it seems to be a data transfer problem with Logic. My question is what can I do about it ????
Is it possible to upgrade my Logic 6.4.1 to a more later version of 6 (i dont want to buy logic 7) and will this even help matters?

[Macintop]

And alway submit your feedback thru Logic's Feedback menu.
It's in menu Logic Pro > Provide Pro Logic Feedback
You can also go directly to: http://www.apple.com/feedback/logicpro.html

I know this is one of the first places Apple engineers and productmanagers look for items to put on the list. And the more we all give feedback on a issue the more priority it will get!

let's rock....