Smiles, Andy Hi Adewale, you need to tell your server to use the php engine to 'parse' files with an html extension.
If you're following my numbers guide, open the calculator (Windows: Windows key type "Calc"). In the new window, double-click the little colored box at the bottom left (above the "Stops" options). Double-click on the little colored box at the bottom right. As soon as you switch to index mode they will look good. Go to the top of the page and have a look at my other PHP articles in the left column!
I am giving you a precise method to achieve the same effect as on the red buttons, but if you have a good eye for colors you can follow the instructions and skip the number instructions. In this example, I'm going for a blue button, and my darkest color is 004a80. In the calculator (in Hex mode), take that number and add 2F (you will find A through F at the bottom of the keypad). Now right-click the OUTSIDE layer and choose "Blending Options". In te new window, click in the middle of the colored bar next to "Gradient". Repeat with INSIDE layer, entering A for the left box and B for the right box. If the colors look strange when you are cropping and resizing, don't worry.
We need to change the gradients in the INSIDE and OUTSIDE layers. For B, take the first two numbers of A (in my example, 00). In my example, this gives me this value for B: 2F75AC.
To hide it by default, open Register.in Themes/default, search for "hide Email", and change the line like so: Basically, you are only typing the word "checked", without quote marks or equal sign or anything.