Since Shareport needs a network to be in place before startup, the delay in getting the network started up may frustrate the Shareport drivers. You could try this free tool to have Shareport started with a delay: http://www.r2.com.au/software.php?page=2&show=startdelay&PHPSESSID=e7ba8dcc37d8a2c24e710d24a70db0ff