iMessage not sending messages on Macbook?

I just got my macbook air last night and i had it all set up.

i opened imessage and entered my apple ID and associated which email id like to receive messages on.

I have my original apple ID and another email, which I seleted my alternate email.

I was able to successfully send one message to a friend.

However, the account i was signed into on my computer was the not the accounted in which i transferred all my files from my PC.

With that, I deleted the account (which was marked admin) and made my other account admin (the one with my migrated files)

Now when I attempted to sign into my imessage, I am unable to send or receive messages.

I did the exact same as said above but I am unsure of where I had gone wrong.

I have already signed out and resigned back in multiple times and repeated the process but have gone unsuccessful.

Any help?