That looks pretty cool and I want to switch from Opera to Mozilla (can't switch to Chrome as it doesn't work in Windows 7 64bit for me) and I want to import my

That looks pretty cool and I want to switch from Opera to Mozilla (can't switch to Chrome as it doesn't work in Windows 7 64bit for me) and I want to import my Opera's information to Mozilla. I click File->Import...->Opera->Next and it shows just empty field. When I try to do the same with Explorer, it works. So, what is the problem, could you give me a hand? Thank you.