Upgrade to Jahia 4.1.1_01

Hello I want to update a Jahia 4.1.0 to the new one 4.1.1_01. 
I use the patch on the website JahiaUpdate4.1.1_01.jar.
 
The patch seems work correctly and I have no errors. The proble is when I tried to update a container I have an exeption : 
 
 
<!--
Error :

Error during handle of operation, Error during handle of operation, root cause:Error while forwarding a Jahia engine's content, Error while forwarding the Engine /jsp/jahia/engines/engine.jsp : Unable to compile class for JSP

An error occurred at line: -1 in the jsp file: null

Generated servlet error:
    [javac] Compiling 1 source file
    [javac] D:\jahia410_build6050\tomcat\work\Standalone\localhost\jahia\jsp\jahia\engines\addcontainer\addcontainer_jsp.java:157: as of release 1.5, 'enum' is a keyword, and may not be used as an identifier
    [javac] (try -source 1.4 or lower to use 'enum' as an identifier)
    [javac]     Enumeration enum = fieldNames.elements();
    [javac]                 ^
    [javac] D:\jahia410_build6050\tomcat\work\Standalone\localhost\jahia\jsp\jahia\engines\addcontainer\addcontainer_jsp.java:159: as of release 1.5, 'enum' is a keyword, and may not be used as an identifier
    [javac] (try -source 1.4 or lower to use 'enum' as an identifier)
    [javac]     while (enum.hasMoreElements()) {
    [javac]            ^

 
This seems to be the version of my jdk. I use actually jdk-1_5_0_05-nb-4_1-win-ml.exe
Is anyone has an idea?
In fact if i install directly the full version 4.1.1_01 I have no errors, so the problems seems to come from the patch.
Thanks for your help.
 
Nicolas
 
Nicolas LAFAURY
Ingénieur étude et dévelopement.
Smile- Motoriste Internet
01-41-40-11-05
[email protected]