External User

hi people,
i have an ad-hoc connection between 2 of my home computers. for the first 3
months the communication has been working most of the time (when it doesn't
work there is a connection made but since then there is only data transmitted
and none received in both computers). this is a week now that i haven't been
connected. again - primal connection is made but ip address is the last thing
that is received, afterwhich there are packets only transmitted.
hope you can help me...
thanks,
mattan