[Aero95]

This is what I could find and I agree with Adam it may need more time.

Soak: To start off grilling our corned beef you need to soak the beef for about 30 minutes per pound and no less than 2 hours. This soaking needs to be done with warm water or the salt will not dissolve effectively. You also need to change the water every hour and rinse the corned beef off when you change the water. You may choose to place the corned beef in a pot of water and set it on your stove over a low heat for the soaking time.