TX SR605 Zone 2 - cannot activate

I have a TX SR605. I recently connected speakers to it, but cannot activate zone 2. When I go to hardware setup, zone 2 is grayed out and I cannot activate it or even choose it. is it a firmware issue or something. if so how do you update the firmware?

In regards to your issue- it would possibly be more effective to contact our Product Support Dept for further assistance with this specific issue via our phone number and hours of operation below. We would like to speak with you and work to troubleshoot and resolve your issue, with you having access to your unit, as prompt as possible.

Thank You;

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