ATTACKING ENTERPRISE NETWORKS not login to DNN by user abd pass

Hi everybody . Currently I’m stuck on ATTACKING ENTERPRISE NETWORKS section. When I set up chisel as instructed or ligo-lo to be able to browse the web to: http://172.16.8.20/Login?returnurl=%2Fadmin the page appears but I can’t log in with Admi**:D0tn31Nuk3R0ck* * is star, this is similar to chisel. Thanks for help