License problems with ibm jvm

Hi,

When using IMB jvm we have following exceptions upon jahia boot:

java.security.NoSuchProviderException: no such provider: SUN
        at java.security.Security.getAlgClassName(Security.java:606)
        at java.security.Security.getImpl(Security.java:1081)
        at java.security.Signature.getInstance(Signature.java:252)


and then:

org.jahia.exceptions.JahiaException: License Limit Violation, Environement 
Initialization Exception
        at org.jahia.bin.Jahia.init(Jahia.java:490)
        at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:935)
        at 
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823)


This behaviour doesn't happen with Sun jvm or JRockIt.

Any help?

Thanks,
Predrag