Undefined offset

Hi!
As i choose to start my CK menu module from level 1 , i receive this notice:

Notice: Undefined offset: 0 in /Users/Shared/Desktop/MAMP/xpower/modules/mod_maximenu_CK/helper.php on line 255

Notice: Trying to get property of non-object in /Users/Shared/Desktop/MAMP/xpower/modules/mod_maximenu_CK/helper.php on line 255

Notice: Undefined offset: 0 in /Users/Shared/Desktop/MAMP/xpower/modules/mod_maximenu_CK/helper.php on line 256

Notice: Trying to get property of non-object in /Users/Shared/Desktop/MAMP/xpower/modules/mod_maximenu_CK/helper.php on line 256

What could be wrong?

hi
please give me your version of joomla and maximenu

i think 4.8 is my MaxiMenuCK

Joomla is the latest 1.5

for joomla 1.5 maximenu is now versoin 4.21.... please update
www.joomlack.fr/Extensions-Joomla-1-5/Modules/

Yep, it fixedthe problem!
sorry, i saw this version but would never guess that 4.21 is newer than 4.8
thanks alot!