Error under MWS when opening a Blaze Advisor Busines Rule Project


I have generated under Blaze Advisor a Rule Maintenance Application and successfully deployed it to MWS using SysAdmin user.
After deployment process, I have assigned the user “Administrator” all the permissions on “My webMethods Application” ressource Type where I can also see specific Permissions for my freshly deployed project (Read Rules, Modify Rules, Deploy Rules …).

The problem is that when I try click on my Rules project name under Administration > business > Business Rules, I get the following error :
Problem accessing /wm_rma_Projet_Calcul_DP/index.jsp. Reason:

And in MWS logs I can see the following error :

Role does not exist: Projet_Calcul_DP.blaze.rma
2011-08-29 16:13:13 CEST (org.mortbay.log:WARN) - Request /wm_rma_Projet_Calcul_DP/index.jsp failed - no realm
2011-08-29 16:13:13 CEST (org.mortbay.log:WARN) - Committed before 500 No realm
2011-08-29 16:13:13 CEST (org.mortbay.log:ERROR) - /wm_rma_Projet_Calcul_DP/index.jsp?items=0
java.lang.IllegalStateException: Committed
at org.mortbay.jetty.Response.resetBuffer(
at org.mortbay.jetty.Response.sendError(
at org.mortbay.jetty.servlet.SessionHandler.handle(
at org.mortbay.jetty.handler.ContextHandler.handle(
at org.mortbay.jetty.webapp.WebAppContext.handle(
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(
at org.mortbay.jetty.handler.HandlerCollection.handle(
at org.mortbay.jetty.handler.HandlerWrapper.handle(
at org.mortbay.jetty.Server.handle(
at org.mortbay.jetty.HttpConnection.handleRequest(
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(
at org.mortbay.jetty.HttpParser.parseNext(
at org.mortbay.jetty.HttpParser.parseAvailable(
at org.mortbay.jetty.HttpConnection.handle(
at org.mortbay.thread.BoundedThreadPool$

[SIZE=1]Does anyone have an idea about that error and how can I solve it in order to access my Rule Maintenance application ?

Thank you in advance for your precious help

PS : currently using MWS version [/SIZE][/SIZE]

Anyone can help on this ? I really need assistance