Tutorial is entitled 3d Glow Style text/Space age text
Follow tutorial to this step....
Recolour Text_colour with your colour. Then Gaussian Blur Text_colour by 6PX. Use Circular Gradient with transparency mode ON, and drag from centre of text towards the outside
The recolor tool fails here when you select a color and try to use recolor tool to chane text color, I invite anyone to try this tutorial, also others in the comments of this tutorial have the same problem...