Hi mates , i m instaling Dahua ip cams for long time but the last progects i made have strange problems whit the playback ,some of the ip cams in the last project cant motion detect 3 out of 8... Today i instaled ptz SD49225GB-HNR all good but when i try to playback from the phone i cant,i see the timeline on the bottom but when i moove to any time nothing hapens. What can be the problem? Thanks.