Can I use a Timer in a .Net Windows Service that I create?

Like, you can't use an interface (you can if you're tricky), but is a timer okay?

My On_Start Event is empty because I have a timer that is suppose to fire every minute, but it doesn't, and I've NFI why.

Enabled is True and interval is 60000.

There are no errors in the event log. Nothing happens. I know it doesn't fire because I write to the event log in timer tick event so I'll know when it fires. It just doesn't fire.

Are Timers allowed in an NT Service? I thought they would be integral considering the nature of services.