I don't know what's going on, but I have created a public subroutine in
my workbook, at the workbook level (not on a sheet) but none of my
sheets can see the subroutine.

I know this should be possible, I could swear I've done this for ages,
but I cannot figure out what is going on here.

The subroutine in ThisWorkbook is defined as:
Public Sub ScoreSummary(rngTarget As Range)

I try to call it from one of the worksheets with a simple call
statement:
Call ScoreSummary(Target)

I type the name using lowercase in the worksheet, and Excel puts the
proper capitalization in place, but I do not get prompted for the the
argument when I type the open parenthesis. When I compile the code, it
fails with sub/function not found.

I am using Excel 2003 on Windows XP sp2.

Anyone know what I'm doing wrong?

Thanks,
Larry