[lubuntu] After installing Lubuntu alongside Windows 7, only Win7 boots. No boot menu

I recently installed Lubuntu 13.04 alongside Win7 but after I reboot, the computer boots directly into Win7 as if I didn't even install Lubuntu. I tried this a couple of time. What the heck is going on? I have installed Lubuntu with Windows before but that was using older motherboards (pre-UEFI). I am currently trying to installing Lubuntu on a system using the "Gigabyte GA-Z87X-D3H" motherboard. Is there some kind of settings I need to set to get this to work?

Thanks in advance.