wifi problems

I need some help
im having some major problems setting up a ad-hoc connection between two windows xp machines. They both are connected to each other the signal is low but they can see each other. They are both able to send data because when i look at the conection window it says 1200 bytes sent. The real problem is neither computer is receiving.
I have been trying to get this going for 2 days now and its driving me mad, any help or good links would be a great help.

I have been trying to get this going for 2 days now and its driving me mad, any help or good links would be a great help.