Dear mujezin

Remove all your modules in that page.
Make a new page and delete the old page.
Don't forget to set a new home page if you've delete your old home page. (Admin settings...) 
Put in your new page the different modules in the different panes and see what happens. Move some modules in your contentpane instead of your left- or rightpane. Expecially when they are wider than the width that is set to the left- en rightpane...
Succes...

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Vriendelijke groeten
Gilbert Vanden Borre

Dear mujezin

Perhaps there are some modules that let you do that. But normally no.
Everything depends how your skin is created.
You can create for instance a skin like this

TopPane
LeftPane	ContentPane	RightPane
BottomPane

Then you can put some content in the different panes. for instance you can put some content in your Left- and RightPane and nothing in your contentpane...
Or
Put some content in your LeftPane and the ContentPane and nothing in the RightPane...
And what settings for the width of the different Panes...
Or
Put some content in the Toppane and nothing in the Left- Content- en RightPane.

Designing pages is not so easy as everyone thinks...

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Vriendelijke groeten
Gilbert Vanden Borre