Your network, how is it all connected? I ask because mine took ages to connect when using a hub not a switch.

Did you do this bit right?.....

Open Notepad, as it is pure text and has no formating. Other editors may embed formating so use Notepad in Accessories. Go to the Data Directory and open gui_rpc_auth.cfg. Blank this file out, removing all text or numbers and Save as using the All Files (*) option in the Save as type: box. THIS IS IMPORTANT. Notepad by default will add a .txt extention to the end of the file and Boinc will ignore it.

Now Open remote_hosts.cfg. If it is not there then create a new file called remote_hosts.cfg. Enter the IP number of the machine that BoincTasks is installed on. You can also enter the hostname of the machine Boinctasks is installed on on another line.

Save this file and reboot.