If you get a message that your password is incorrect, use 'Get New Password' to get a new one.
If you get no message then your password is probably fine. Firstly clear your cookies. Secondly, ensure firewall or anti-spy software is either accepting cookies or preferably disabled all together, if only temporarily in order to diagnose the problem.
You can delete all cookies set by this web site using this link - http://www.corsasport.co.uk/board/misc.php?action=logout&clearall=cookies
You can clear cookies in Internet Explorer by going to Tools menu, Internet Options, Delete Cookies.
You can clear cookies in Firefox by going to Tools menu, Options, Privacy, Show Cookies, Remove All Cookies.
You can usually disable firewall or anti-spy software by right-clicking its icon adjacent to the clock on the bottom right of your screen and choosing the option to disable protection.
If you are still unable to log in, try it from another computer.
If your email address is wrong and you can't use 'Get New Password', contact me.
If your email address is correct but mails don't arrive, check your junk folder, then contact me.
If you don't know your username, contact me.
If after having done all of the above you are still having problems please contact me. If you have not done all of the above, you will be asked to do all of the above.
When you contact me, give me as much detail as you can. 'It doesn't work' is not sufficient detail.
[Edited on 11-05-2010 by Ian]