Since version 0.1.2 HighWire gets its online capability by loading an external OVL (to receive online documents). There is support for the two main IP-stacks now: 'STik2.ovl' and 'MiNTnet.ovl'. HighWire will always try to load 'network.ovl' from this directory; if this doesn't exist, HighWire will give up and doesn't support any online stuff for this session. So rename the OVL with your prefered IP-stack (or symlink to it, on a more comfortable filesystem) to 'network.ovl' and Highwire will happily load from the net :-)