|The most likely reasons for this are: you entered an incorrect username or password (check the email you were sent when you first registered) or the administrator has deleted or suspended your account for some reason. If it is the latter case then perhaps you did not post anything that may have breached the terms and conditions?
Otherwise - are you sure you actually registered?
If you created a profile more than two years ago (using the old profiles system) the pagename and password are not an actual SPRACI account. (the old profiles system used its own simple authentication which was not compatible with the authentication methods used currently on SPRACI.)
To edit that kind of old profile you need to register and import it into "my profile".