Weighted overlay tool help needed!

I am trying to use the weighted overlay tool combine several different feature classes which I have converted to Integer Raster datasets. However, whenever I run the tool, there is no data in the resulting feature class output and there are no values in the attribute table but there were no errors highlighted while the tool was running.
If anyone knows what I am doing wrong or could suggest a way to remedy this, it would be greatly appreciated!
Thanks :)