Hi Bjoerm,
Follow the sap note 1450166 - Unauthorized usage of application functionality
Checked the patches you need to apply :
SAP J2EE ENGINE 7.01
SAP JAVA TECH SERVICES 7.01
SAP J2EE ENGINE CORE 7.01
You need to apply this three patches together , or
try to deploy
SAP_JTECHS through telnet.
telnet localhost 5$$08
Logon with administrator user (java user)
deploy <path>/<java_pactch.SCA version_rule=all
I thing it will help you.
With Regards
Ashutosh Chaturvedi