Wrong view in IE

Hello,
I’ve asked about this 3 or 4 times, but I’haven’t had any answer. My menu displays OK in Chrome and Firefoz but when I try it in IE it doesn’t appear Ok, it displays in two rows, and I don’t know how to solve it.

It’s very strange because I can see it OK in Chrome and Firefox, but I don’t know what happens to IE.

Is there any CSS code or something similar, it’s very important to me to fix this.

Please tell me something about this, I’ve asked several times.