help is much appreciated!

Baby*Kisses

i've been trying to get to my profile so i can change my siggy. everytime i go to my profile it says i need o log in or sign up to change anything (which obviously i have an account). so i go to log in and put in my stuff and it comes back with some kind of error. its been doin this for the past idk how many months. it used to be i could get to my info through the nest but it says the same thing too now...

any help is appreciated  

Baby*Kisses

it says its an "invalid file name"... if that helps