creating a trust between 2 domains

ok ive created a trusts between two domains.. and now i get to the log in screen i see the other domain that i trust under mine domain.. now the problem i have is that when i log in a window pops up and says that “the user cannot log in interactively” ive created the global groups the domain local groups .. and still gives me errors.. please dont give me the steps from the microsoft site because thats what i used and i also followed many other steps on creating a trust between two domains and the window “user cannot log in interactively” still shows up.. so pls help..