MegaWizard SDRAM controller - Black window

Hello

I want to generate an SDRAM controller for my EP4CE22F17C6 and the DE0-Nano. I open the MegaWizard and then select External Memory, DDR SDRAM Controller, DDR SDRAM with ALTMEMPHY 11.1.

After that, a little window starts loading the plugin but then the wizard only shows a black window, nothing inside.

I am using Windows 7 Home Premium 64 bits and Quartus 11.1 32 bits.

I updated Java just in case, but the black window still shows up.

You can see the image with this link:

hxxp://postimage.org/image/yipn4w8it/

(Replace the hxxp with http)

Is there a way to fix this?

Thanks.