I upgraded my mac book pro from leopard to lion a few days back. I had already installed Ms office 2011 for mac and needed to transfer all my mails from apple mail to outlook 2011. But the import option in outlook 2011 will not import the mails at all. After performing all the steps all I get imported is the blank mail folders.

I have also gone for other alternative methods explained online but none works. Is it the quantity of my mails that is stopping me to do that or my mails are corrupted?? Please help if there is any other way to transfer mails from apple mail to outlook 2011.