My Facebook only logs in on certain phones? help please 10points?

[Chelsea]

I have a Sony Ericsson Xperia x10 and my fb logs in fine on that phone but when I log in on other phones it says my password is incorrect and it's definitely not! I'm so confused, why does it only login on that phone but not others?

thanks for your help, ten points the best answer

[Taylor]

This probably happens because you have never signed in to facebook on those sources. Im not positive though. I could be wrong. Just making a guess here.