Camera EOS 600D doesn't turn on with this lens

Hello, Got a Canon pakkage with Canon EOS 600D camera and two lenses; a 50mm-0,45m/1,5ft and a Canon EF-S 18-55mm F3.5-5.6 IS II. The 50mm lens is working good, but the 18-55mm lens doesn't turn the camera on. The fisrt two times i tried this lens, it was working. After that it didn't anymore. Took out the simcard and batterypack and disconnected the lens. Put everything back in place and the camera was working for a small period of time. Now the camera doesn't turn on with the 18-55mm lens; camera still works good with 50mm lens. Do you have any suggestions? thank you, greetzzz, André