[Q] CWM Not Working!!

I have a verizon samsung galaxy s3 (sch-i535) and everytime i try to flash cwm on my phone using odin it always says fail. I have tried like 5 different videos on youtube that should work but i keep getting failed because "SECURE CHECK FAIL : recovery". That's what it says on the phone. On Odin it says
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> SingleDownload.
<ID:0/004> recovery.img
<ID:0/004> NAND Write Start!!
<ID:0/004> FAIL! (Auth)
<ID:0/004>
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)



Can anyone help me please?! Thanks in advance.