weird playback problem with pro tools 7

[wreckthisplace]

hey all

i just upgraded to pro tools 7. when i loaded up an old session and pressed play and/or the space bar it wouldn't play.
it sort of moves a bit but then stops. no audio can be heard though.

has anyone experienced this yet? i have yet to uninstall everything and reinstall pro tools and do the update again. just thought i'd check here first to see if its a known problem.

ALSO...one small question. to save a session i usually press APPLE + S. i do it frequently in case something goes wrong. in pro tools 7 when i do it a save box comes up. this is a bother since it takes away the whole aspect of quickly saving a session. is there a way to turn this off?

thanks in advance guys.

cheers



powermac G5 dual 2.5 ghz
1 gig ram
80 gig hard drive
120g media drive