Ok thank you, with your informations and by digging the documentation, I understood :
1/ The 3 jar given with the gwt edition 2.0.0 (client side) : - org.restlet.jar - org.restlet.ext.json.jar - org.restlet.ext.xml.jar must be in the class path of the project (file can be where ever we want, just add it to the class path). 2/ The jar given with the edition corresponding to the server side used (jee in my case), must be placed in : war/WEB-INF/lib and then added to the classpath. When reading the doc it is not said clearly, i hope this post will help other people with the same misunderstanding. anyway, it work's well, thank you for your help ! ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2643907
