"Incorrect Login" when trying to login on the website, but not the client??

[Purified Water]

I'm getting pissed off. I've been trying to login on a "third-party" website through Steam. However, I can't do it because steam insists that the login that was successful three seconds ago is no longer the correct information to login. So I get the "Incorrect Login" prompt above my name and the "Sign In" button even though I'm logged in the website.

Help, please?

[Def Not A Smurf]

having same problem

[DarkSSSSSSSSSS]

me too