help me erro: rtmpdump error rtmp_readpacket failed to read rtmp packet header

help me erro: rtmpdump error rtmp_readpacket failed to read rtmp packet header

I can not download videoI run cmd and

c: \ users \ quynh chellam> "c: \ r \ rtmpdump.exe" rtmpdump-r "RTMP :/ / media.hocmai.vn/hocmaisrv/2011-2012/Vatli/LTDH/Dang_Viet_Hung/07.21.Dai_cuong_ve_dao_dong_dieu_hoa_ (Phan_1 ) / "-a" hocmaisrv/2011-2012/Vatli/LTDH/Dang_Viet_Hung/07.21.Dai_cuong_ve_dao_dong_dieu_hoa_ (Phan_1) / "-f" WIN 11,0,1,152 " -p" http://hocmai.vn/file.php/254/moddata/scorm/6040/index.html?vitri=1 "-CS: passed_para - y "01.flv"-o 01.flv

but error. as the image " "

directory c: \ r \ " "

for example help me dowload video : http://hocmai.vn/mod/scorm/player.php?a=7921&currentorg=TOC1&scoid=64603

username: helpme9x

password: helpme90