Application stopped error when accessing useradmin

Hello,

previously I had a NW2004 with SP15 installed on a server. Then I upgraded it to SP17, installation was completed successfully, but afterwards I found 2 errors:

1. There are no branding images in portal logon at .../irj/portal (i.e. there is red cross and pictures are unavailable).

2. When I type .../useradmin, I get following error:

503 Service Unavailable

SAP J2EE Engine/6.40

Application cannot be started.

Details: com.sap.engine.services.deploy.container.ExceptionInfo: JMS error.

Could you help me what's wrong? I still can't figure it out.

Thank you in advance.

Marek Jenej