Not "seeing" in color and not "seeing" in B&W is generally not the problem. It is typically an excuse for not matching your previsualizations with your desired results. Photography, color or monochrome, is by definition, "writing with light" not seeing color or tones of grey.

The remedy is to begin and practice seeing light. The distribution (or compostion) and range of light (any inferences intended), both color and monochrome, will fall into line naturally once you command light. Use your spotmeter while dry shooting to begin to understand where and of what intensity the light is. A study of the Zone System (AA's "The Negative") will be helpful in this regard if you have no innate ability to judge light by eye and heart.