Hmmm.... I typed a response to this back on the 25th. I guess the board ate it.
If you can't use the buttons, just type in the BBL code. It's usually faster & easier anyway.
[b][u]bold & underline[/u][/b] [Note: The order in which you close the tags is important in combinations.]
You must use both the opening and closing tags. "Preview" is our friend! There are several others, but these are the basics.