Menu item with blank screen

Hi to all, and thank you for the great extension Mj!
I have a problem, on my site i have installed succesfully the mj 0.9.10, that seems to be working fine.
I have an iphone menu with 8 menu items, but 1 of these (section / blog) have some problems, because shows a blank screen. The oters menu items working fine.
If anyone want to try the site is www.domogiovane.it/it.
Thank you!

Which of them (there more than 8 items) doesn't work?

Hi, yes i have added more items after posting...sorry...the item tath doesnt work is "Iniziative"...i attach the printscreen of the menu configuration

The server replies with error #500 (Internal Error), so you should check your error_log to get to know the reason of this error.

Hy, thank you for all... the error log regarding mj, says:
[Fri Jan 21 12:31:15 2011] [error] [client 158.102.162.6] PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 3508 bytes) in /var/www/vhosts/domogiovane.it/httpdocs/it/administrator/components/com_mobilejoomla/imagerescaler.class.php on line 230, referer: app:/ShaunAirFlex.swf

[Fri Jan 21 12:31:15 2011] [error] [client 158.102.162.6] PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 14032 bytes) in /var/www/vhosts/domogiovane.it/httpdocs/it/administrator/components/com_mobilejoomla/imagerescaler.class.php on line 230, referer: www.domogiovane.it/it/

It means that MJ cannot rescale very big image (most likely images/stories/beachagosto.jpg of 10Mb) because of memory limit.