Topic on Help talk:Logging in/Flow

I can't log-in to anyother MediaWiki website other than "MediaWiki" and "Wikipedia"

1
A&L Interactive (talkcontribs)

I swear I know my password, but whenever I try to log-in to any MediaWiki website other than the afromentioned, it says that "Username or password is incorrect", I tried checking my cookies and they look allowed, is it related to my username or what?