How can I make Sir understand

Hey guys/girls...

I just wanted to introduce myself properly.I've been a longtime "lurker"...I'm a Sub with a Dom (Sir) living a long way away from me.He has a wife, who is not made familiar with me and my Dom, but this is because she is sick and wouldn't understand. Which is why I'm still aboard.

Anyway - My Dom is the first Dom I've met, so I'm pretty much relying on him to make the right decissions.However, I've been very pleased so far, and it seems he's doing a great deal of learning which means I am also learning.

He has me collared, but I am not day collared, which I really need.

I've mentioned this to him a few times and he seems like he understands, but it still hasn't happened.

How do I make him realize that this is really important to me?