about SOS blogs

Dunno if this is really on the right place, but i dunno where else to ask it. ^^

thing is i wanna synchronize a blog i made together with my forum.

the only problem is that when it asks for my email and password which i wrote correctly if not mistaken it says Wrong login/password.

why is that?

and why does it ask for those?

shouldn't it be like the forum link or something?

tnx in advance. ^^