Sonicwall Configuration page empty

I have a sonicewall 2040 pro… for some reason, when i log on to configure it, it accepts my password, pops up a window for changing my logon period (30min or less) and in the main window it displays a message “Sonicwall has granted you access” . However, there is nothing else displayed in the page. i cannot click on anything. i was expecting either the configuration wizard to show up per default settings or to get a page with a left index that allows me to choose what i want to configure.
i have tried IE6, IE7 IE8, Safari, Firefox, from winXP, win7 and win server 2003.. but still cannot figure it out.
Also, pop-up enabled
Even turning off the device (per sonicwall support) was tried without any results.

any ideas to try?