Picked up a Cateye Double wireless computer with heart rate strap and started using it recently. It works great except this: The darn thing hasn't gone into sleep mode and i used it last on thursday. That's right, 2 days and it's still not in sleep mode. Supposedly this is supposed to happen automatically after 10 mins of inactivity but nope. I tried resetting, clearing the odometer, leaving it on the bike...Nothing.

Anyone have any ideas?

Go to Cateye website, send them an email about the issue.