Our cat's driving us crazy!!!

Hi to all maybve you can help us.

I have a one year old half siberian cat called milka.
She is a very good cat but she is a different creature at night.
The moment its time for us to go to bed she starts going crazy and its as if she doesnt want us to go to sleep.so we put her outside the bedroom door and after a while she starts scratching the door like crazy and only stops when we open the door.we tried to ignore it but she can go on with it for hours.
If we do eventually open the door she tries waking us up again....
at the end she calms down and at 5 am sharp she starts at it again.

please help us we're getting tired off this routine

I've read th article about cat crazies and some other messages about the night problems cats do!!!!!

thanks i'll try all those and see what happens....

We're going through this with our 4th cat now. The only thing is that he's pouncing on the other cats at night.

Last night we didn't let him sleep at all from 7 pm until we went to bed. We just kept playing with him...but sure enough 12:30/4:30 am rolls around and we get awaken. So, I just went out and picked up "Da Bird" in hopes that based on the article this will help satisfy his pouncing cravins'!