WS Security - digest password - authentication failure ?

Hi,

I have a problem with WSSE authentication with digest password type.

On my Oracle Application Server 10.1.3.1 I configured a service which I test with soapUI. When I use authentication with "Plain Text" password type, everything works ok.
The problem is when I change the authentication type to "Digest" (both on a server and soapUI). I get "Authentication failure" error from server. Username and password are the same as previously so they must be correct.

Which is surprising, client generated from JDeveloper works with digest password.

What can be the problem ? Is it possible that soapUI generates different digest than Oracle ?

I would be grateful not only for a solution, but also constructive ideas that can help me to find and answer.

Thanks in advance.
Marcin