sound not in fc5 but in fc 2 working

i am using toshiba laptop model a60
using xp and fedora
when i use fedora 2 . sound is working, but when i upgrade to fc5
my sound is not is not working
can anybody help me

also i can connect to internet to dsl through my network card.
and also i can connect to a win proxy

pls anybody can tell me how i can make my fc 5 as a proxy

(then i need to connect from win and linux )

regards
sadique

For proxy you can use squid, as for the sound - are you sure that you have all the drivers installed ?
Also, determine your sound card model, and try to play with "alsa" modules.
I found this in fedora dosc :

Not tested though....