ERROR WHEN LOGIN AFTER SIGNUP!

[RexJoker123]

I have that error after SIGNUP, and now I log and when i put username + password + captcha DISPLAY ERROR:

"Error: Username or password incorrect!

Don't remember your password? Recover your password!"

Why??!! And for resolv that , I need to recover password... and My site give me that password Dh7Kst93js990 , I login with that and I LOGIN SUCCESFULLY, but that is a bug... :((

I attachment what TSSE I used.. :P
If resolve that I thank you!