Hi. I don't know this movies name, I saw I like 4 years ago.
Its an old movie, and its about some people going into a big rock/cave and then they are in another time/back in time, in some kind of jungle with monkeys/primates. And Im almost sure that these creatures are evil and take the people as prisoners.

I really need help, and if I can remember more I will write again.

Im not sure but MAYBE it was a Hallmark movie in 2 parts.

Planet of the Apes, perhaps?

Nope :(

Could it be the 1989 version of Journey to the Center of the Earth?
Amazon.com: Journey to the Center of the Earth (1989): Emo Philips, Paul Carafotes, Jaclyn… (http://www.amazon.com/Journey-Center-Earth-Emo-Philips/dp/B000ALM4MG%3FSubscriptionId%3DAKIAJZOUJH7RJ3VBW3YQ %26tag%3Dws%26linkCode%3Dxm2%26camp%3D2025%26creat ive%3D165953%26creativeASIN%3DB000ALM4MG)

:( No. But thanks.. Im slowly getting crazy because I can't find it anywhere