I "googled" your problem (is that a word in English?

) and found out that one source of errors could be your browser settings. What browser do you use? And the cookies, are they activated? In addition please check whether you ticked "Automatically login" (or whatever it is in the English version of this board).
If that does not have any effect, please delete the board cookies (at the bottom of the board). In addition please also delete the browser cookies and perhaps the cache as well. Then try again.
If that does not help, deactivate your browser cookies, then try again.
If the problem occurs again, please use a different browser tentatively.
Since you seem to be the only one struggling with this problem (at least at the moment), it's probably not a database error.
Please try these proposals, hon and let me know whether they were helpful.