level 4-3 help!

[beaver82]

i'm stuck there, at the start of 4-3 level, where you have to roll down the 2 stone balls, then there's a box...

after 30 mins i succeded to push it down the narrow passage but nothing happened http://www.pontifex2.com/iB_html/non-cgi/emoticons/sad.gif" border="0" valign="absmiddle" alt=':('>

what i've to do to go on?

[beaver82]

i've found the secret passage on the left http://www.pontifex2.com/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>