[V8i sS2] Unable to Place Centerline Symbol from Simplex shx

In the fonts now delivered with MicroStation are a number of AutoCAD fonts. One I like is Symplex as it has a number of Civil Engineering characters like C/L B/L M/L where the two letters overlap. I can see them in the word processor and in the Symbols dialog box. But when I move my cursor into a view to place the text, the character displays as a ?. And when placed, remains the ?

If I select it to edit, the ? remains, but I can use the symbol dialog box to replace it with the correct glyph, in the editor. But if I accept the edit, the text in the file retains the ? and does not show me the C/L glyph.

I have used this before in other files. Any thoughts on why this is occurring?