Hi Jumbo - like PaQ mentioned you can select the front face to fillet all the edges attached to it which is a nice shortcut for this kind of thing.

And if you want to fillet all edges, you can do that by selecting the whole object instead of individual edges.

Text can often have situations like very sharp pointed corners and tightly bent curves which can make for difficult filleting situations. Like you saw, it is pretty easy to ask for a fillet that will not fit in the given area because of going around a bend. So it is usually a good idea to also try smaller values and see if that will give you a result.

- Michael