That's very odd! Stanza doesn't do anything different than any other network traffic. Do you happen to know if you have some firewall enabled? Taking a look at http://www.lexcycle.com/faq/troubleshooting_sharing might help. If not, then you might want to seek alternate means to get your books on your phone (listed at http://www.lexcycle.com/faq/how_to_get_books_onto_stanza_iphone).