I have to admit that I was one of the people that had difficulty finding the letters in the photograph and that may have been the root cause of your problems.
You might have considered cropping out the windows on the right hand side, as well as the large cement bench at the forefront, since both are very distracting. Reducing the amount of wall shown on the left might have helped also.
I did really like the colour contrast and the sharpness of the photo.
I like the idea behind this composition, but it has the feel of a snapshot. If you could have changed the angle so that the windows were out of the picture it would help. I think the cropping is a bit tight.
I love the photo, don't get me wromg. The brick contrasts well with the subject, but did I miss the letter portion of the picture? Maybe include it in the title.