2001 V70 -- Homelink training problem

I have a 'new to me' 2001 V70 T5 with Homelink. I'm following the instructions in the manual. First I erase the buttons, which works fine.

Then I try to train to my remote. I hold down the Homelink button and the remote control button together. It slow blinks, but NEVER fast blinks. I know I need to do the rolling code procedure, but can't get far enough (fast blink) to do that.

The garage door opener is an Overhead Door.

Any suggestions?

Thanks,

Tom