Error 404 on PUT request while having a GET - spring

Question

Got a small problem on my rest server. It's based on spring web framework.
Here's the code that poses me problems :
#RestController
#RequestMapping("users")
public class usersWS {
//some other functions
//works
#RequestMapping(
value="/{iduser}/functions/",
method=RequestMethod.GET,
produces={"application/json"})
public ResponseEntity<String> getUserFunctions(#PathVariable("iduser") String iduser){
//do stuff
return stuff;
}
//Don't works
#RequestMapping(
value="/{iduser}/functions/"
method=RequestMethod.PUT,
consumes={"application/json"})
public ResponseEntity<String> addUserFunctions(#RequestBody String json, #PathVariable("iduser") String iduser){
//do stuff
return stuff;
}
}
Server is launched by :
#SpringBootApplication()
#ImportResource("classpath*:**/jdbc-context.xml")
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
To call this server, I use the HTML handler found here : Spring HTTP Client
When I call the get verb, everything is working fine. I get the iduser, get the data I want, no problem.
When I call the put verb... I have an error 404. I checked, the url (http://localhost:8080/users/xxx/functions/) are exactly the same, I do send the body.
I would understand to get a 405 error, but I really don't understand how I can have a 404. If the mapping was wrong, the server should at least see that there is a function on the get verb and throw me a 405.
I have other functions using the PUT/POST that are working but they don't have a #PathVariable. Is it possible to mix #RequestBody and #PathVariable ?
Any help is gladly welcome.