Problem durig Install of RRDI 5.0 on existing 5.0 CLM Plateforme

HI all,
I'm trying to install RDDI (Rational Reporting Server) 5.0 on an existing CLM plateform.
During the install everything goes fine until the deployment of the COGNS canevases freezes at this point

In file rrdi-setup.log
06/13/2014 18:08:32,270 INFO  com.ibm.rational.rrdi.setup.biserver.service.WasDeploymentService : CRRRA2041I: Create the data source connection to the data warehouse.

In the cognos log files cogserver.log, I get this Fatal error
45159   2014-06-13 18:13:31.797 +1      rsProcessStarter        na              0      
                warptaskmta-ProcessManager-ProcessMgrThread     DISP    5003    1       
                Audit.Other.dispatcher.DISP.pogo        pogo    com.cognos.pogo.reportservice.ProcessManager   Failure
<messages>
    <message>
        <messageString>DPR-DPR-1035 Dispatcher detected an error.</messageString>
    </message>
    <message>
        <messageString>Process BIBusTKServerMain failed to start properly.</messageString>
    </message>
</messages> 
External Report Server process BIBusTKServerMain cannot be startedProcess BIBusTKServerMain failed to start properly.java.io.IOException: Process BIBusTKServerMain failed to start properly.  
    at com.cognos.pogo.reportservice.ReportServerProcess.getProcessOutput(ReportServerProcess.java:182)     
    at com.cognos.pogo.reportservice.ReportServerProcess.start(ReportServerProcess.java:125)        
    at com.cognos.pogo.reportservice.ProcessFacade.createServerProcess(ProcessFacade.java:275)      
    at com.cognos.pogo.reportservice.ProcessFacade.<init>(ProcessFacade.java:158)   
    at com.cognos.pogo.reportservice.ProcessFacade.<init>(ProcessFacade.java:117)
    at com.cognos.pogo.reportservice.RSComponentFactory.newProcessFacade(RSComponentFactory.java:76)        
    at com.cognos.pogo.reportservice.ProcessManager.createProcessFacade(ProcessManager.java:516)    
    at com.cognos.pogo.reportservice.ProcessManager.startProcess(ProcessManager.java:492)   
    at com.cognos.pogo.reportservice.ProcessManager.startProcessesDueToCapacity(ProcessManager.java:387) 
    at com.cognos.pogo.reportservice.ProcessManager.safeRun(ProcessManager.java:345)        
    at com.cognos.pogo.util.threads.SafeThread.run(SafeThread.java:61)

I've tried lots of stuff such as adding the MALLOC=watson environment variable and changing the BIBusTKServerMain file to allow all the rights on the server.

The first problem is that it doesn't work but also that the error log gets filled with thousnads of the same message showed on top.

Do you know were the problem would be ?