Beaglebone black CTS/RTS not working

[lollokara]

Hi, i'm trying to get CTS RTS working on any of the 4 exposed serials that's what i'm trying to do:
echo BB-UART2-RTSCTS > /sys/devices/platform/bone_capemgr/slots
cat /sys/devices/platform/bone_capemgr/slots 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 4: P-O-L- 0 Override Board Name,00A0,Override Manuf, BB-UART2-RTSCTS
But when on python i try to operate cts or rts or the serial nothing shows up.
Thanks for the support