Networking Drives using Vista

I am using 3 vista machains and everything is working out fine but when it
comes to networking my drives not folders i have a issue. I did everything to
my knowledge and also did the registry thing mentioned by Jimmy Brush and
that worked fine with 2 pc but the third pc i had no luck and thats the pc am
using as the server whech i really need to be accessing. Is there any
additional information on how to get around this that isn't mentioned. Please
help