After update from 1.7 to last - my users cannot login !

Hello, all!

I'm in real trouble now!
please, help!

I have just upgraded my 1.7 minibb to the last one.
But I see, that neither me (admin) nor simple user cannot user their old login\passowrd information to post into the forums.

What happens ?

There should be no bugs if you've done all updates correctly. We're sure the reason of error is on your side. Additionally, you haven't provided any useful information, which gives a possibility at least to give an advice.

We're providing only paid support on such kind of custom problems.