it could be more to do with the strength of the signal from the AOL router. with every obstacle placed in the way of the signal, the signal weakens thus making a connection weaker. add to this the distance and it maybe difficult. the router supplied is a "g" but the newer mimo or pre-n as it is also known gives a stronger and allows the signal to travel further. as this is a signal any body can access your network using your bandwidth free so an encryption is to be recommended, so if the signal is already weak this may break it.
there are walk arounds for this such as buying a "bridge". this will retransmit the signal.
for the setup as it is you will need an adaptor either usb or pci to receive the signal