All of you iPhone experts..

..do you happen to know, how to put video onto the iphone? ok here's my situation:
I have movies in my iTunes under the 'movies' tab or whatever u wanna call it, and I had no problems putting them onto my iPod nano. However when I connect the iPhone, it doesn't recognize them and I get a little message saying that there are no rented movies in the iTunes library.

So does anyone know how to put those movies onto the iphone?
If you do please help!

Thanks a million

-Terks