Siebel always shows that error message if anything goes wrong while authenticating the user. Anything may be:
- Wrong username or password.
- Database not available.
- SRF file is corrupted.
- SRF file is out of date (specially, if there have been any changes to the tables and those changes are not compiled in your SRF).
- CFG file is not properly configured.
- Custom code on ApplicationStart produces an exception.
- ...
Doesn't matter what the problem is, Siebel will always tell you that the username/password are wrong.
You may find what your actual problem is by checking the latest siebel.log file, which should be placed in .../Client/log/, unless you changed its location.
As an alternative, you can keep reentering your username and password. Siebel gives you 3 attempts to enter your credentials. The 2 first ones will show the "wrong password" message; however, the third and last attempt will show you the actual problem instead. At least, that's how it works in Siebel 7.8.
Anyway, it's better to just check the log file, since it will contain more information.