How do you make tripcodes appear?

I've been posting on 4chan for about a year, and I could never see tripcode beside my names, whereas others have them when they post.

Is this normal? If so, how do you make them appear? or how do you figure out what your tripcode is?

Thanks a lot.

http://en.wikipedia.org/wiki/Octothorpe

The symbol is traditionally called the pound sign in the US. It derives from a series of abbreviations for pound avoirdupois, a unit of weight. At first "lb." was used; later, printers got a special font made up of an "lb" with a line thorough the ascenders so that the "l" would not be mistaken for a "1". Unicode sign 2114 in hexadecimal (℔) is called the "LB Bar Symbol," and it is a cursive development of this symbol. Finally came the reduction to two horizontal and two vertical strokes.
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