Upgrade License.

Hi,

i have now migrate the ServiceDesk to latest Version
7.0.0 BuildNumber: 7009

But after Upgrading the license i have this error:

HTTP Status 500 -

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type Exception report
message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.io.FileNotFoundException: license (Zugriff verweigert)
java.io.FileOutputStream.open(Native Method)
java.io.FileOutputStream.<init>(Unknown Source)
java.io.FileOutputStream.<init>(Unknown Source)
org.apache.jsp.jsp.Register_jsp._jspService(Register_jsp.java:317)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
com.adventnet.servicedesk.filter.EncodingFilter.doFilter(EncodingFilter.java:92)
com.adventnet.authentication.ContextChangeDetector.doFilter(ContextChangeDetector.java:100)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

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Apache Tomcat/5.0.28

Can somebody please help me.
rgds
agent49