question about L&S with lan and ICS

hi!
my system has 2 computers (XP/SP2) connected thru network card and sharing the internet connection.
im using sygate right now, ICS works fine, but i have a lot of problems when it comes to access the HD on the other computer... sometimes it works, sometimes it doesnt see the remote HDs, sometimes it works only on one computer, sometimes i have to reboot a computer to make it work again and so on...
does L&S have this kind of problems? thanks in advance!