galaxy core in download mode only!! topic

hi guys
i have galaxy core duos i8262 rooted.
i flashed custom recovery by rashr app ,
I got the message "reboot into recovery mode" i clicked on yes please & the phone boot into download mode :confused:
i wanna to connect the phone to flash stock rom by odin but the pc send messege
"SAMSUNG mobile USB CDC composite device X False :crying:

i need help please :)
sorry for my english