Fyi, i've made a new try with Liferay 6.0.6 Community Edition and all works fine with the custom/portlet_war/konakart.war
It seems there is a problem with the Liferay version 6.0 SP2 EE Build 6012 July 27, 2011
I'll continue with 6.0.6 !
Thanks for your patience !
It seems there is a problem with the Liferay version 6.0 SP2 EE Build 6012 July 27, 2011

I'll continue with 6.0.6 !
Thanks for your patience !