Login module - Empty password not allowed

[RagingBull]

I'm using VirtueMart 2.6.6 and joomla 2.5.20
I have a problem, I register normally, but when I write user name and password in login form on my site I'm getting message Empty password not allowed

Picture is in attachment, I really need some advice, few days ago I was able to login, but now, I dont now

[attachment cleanup by admin]

[GJC Web Design]

same named forms posting the empty password of the other?

check your $_Post to see what is being posted (why show both forms on that page?)