xp crashes when connecting network

> i have one pc running xp pro, sharing an adsl connection,
> i also have another computer running xp home hooked up
> using a cross-over cable, i have gotten communication
> between the two pcs via pinging, however when the xp home
> user attempts to access the shared internet (and it does
> work, IE loads pages) however this causes the xp pro pc
> to crash, it stalls and im forced to reload, if i
> disconnect the connection the xp pro pc works fine.
> please give us a hand