Hi guys! ask lang ko ba, i bought this canon rc-6 wireless remote before for my 7d and it works perfectly fine with my 7d but i recently purchased a 5d mark ii now, every time i try to connect it with my 5d it doesn't seem to work? I'm pretty sure i have done everything the manual said to do? i even replaced the battery but still no success

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now question is, is there anything in the setting that i need to change for the wireless remote to work? or do i have to send my 5d to canon service centre?
help tawon mo