[TYPO3-english] sr_feuser - user able to register, but not to login

[ktt]

I setup sr_feuser - registration works, registered user appears in
sysfolder and being assigned to userGroupUponRegistration.

After registration i get confirmation message in browser with the form to try
registration, but I get error:

sr_feuser_register: The form's token is too short!

After I try to login from a login page, get error message: 
"Login failure An error occurred during login. Most likely you didn't enter the username or password correctly...."

Maybe login box (felogin) doesn't correlate with sr_feuser? Asigning user to userGroupAfterConfirmation doesn't help either..

Thank you in advance,
Ktt