Question [Q] [HELP] Can't Install CWM Recovery!! boots into Factory Mode?

Can't boot into DOWNLOAD MODE.
when ever i press [Vol Down+Home+Power] i always land in FACTORY MODE.
i want DOWNLOAD MODE for Installing CWM Recovery or any custom recovery.

please someone help

UPDATE: 1
i have Rooted my mobile via one click quick Root Genius.
But still can't install CWM Recovery or enable DOWNLOAD/ODIN MODE for flashing by rebooting [ Vol down + power + home button (all at the same time) ]

UPDATE: 2
i also get error on TERMINAL APP for efs folder fix Factory Mode because there is NO folder named "efs" or "FolderApp" in root of my Android.

UPDATE: 3
tried ADB. it does detect my phone.
on command "adb reboot download"
it does the simple reboot, Does Not reboot into Download Mode.



my phone specs are:
model: gt-i9082 Grand Duos
Made in Vietnam by Samsung
base-band: ZTAMH1
Android ver: 4.1.2 Original Stock ROOTED (but it says Ice Cream Sandwich when i tap it)
I like stable, good-battery, bare-bone (minimal) ROM for my Android mobile.
I use Go SMS Pro, LG Camera app, Calls & hate running processes.
my current setting:
SD Card: 16gb Class 10