Please need help on Middlegen with Weblogic

Hi,
I am using Mysql 4 with Weblogic 7.
When testing de airline sample I have an error when running Middlegen by the 
ant command after created tables:
[...]
compile-ejb:
     [javac] Compiling 47 source files to 
C:\middlegen-2.0-vo\samples\build\classes

ejb-jar:
     [mkdir] Created dir: C:\middlegen-2.0-vo\samples\build\ejb
       [jar] Building jar: 
C:\middlegen-2.0-vo\samples\build\ejb\airline-ejb.jar

check-weblogic-jar:

fail-if-not-weblogic-jar-present:

postprocess-ejb-jar:
      [move] Moving 1 files to C:\middlegen-2.0-vo\samples\build\ejb
      [echo] Running weblogic.ejbc



      [java] ERROR: Error from ejbc: Unable to set the method permission for 
method 'create()'. No matching method could be found. Please verify the 
method signature specified in the ejb-jar.xml file matches that of your 
LocalHome interface.


      [java] ERROR: ejbc found errors




BUILD FAILED
C:\middlegen-2.0-vo\samples\config\ejb\weblogic.xml:61: Java returned: 1

Total time: 40 seconds
[End]


Can somebody help me ?

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