error message when starting live 5

[marc atkins]

hi guys can u help?

the thing is when i save a file and close live, if i re-open open live and try to open the same or a new file i get a pop up window

which says 'cannot delete users/music/ableton/live recordings/decoding cache/ cachecontent.idx '

so i have to go through the hard drive as above and delete that file every time as it creates that file every time i save and quit from live. maybe i have a setting wrong or something?? or is it because i had the demo on first?

i use a g4 imac with 768mb ram and mac osx 10.3.9