Index entries: only the first instane appears.

[mail.k]

I've marked some words or phrases in my text as "index entries" and 
added the index at the end of the document. But if an indexed term 
appears, say, on pages 3, 26, and 154, the index will list only the 
first instance, i.e., page 3.

I'm using 1.4.2-1, Miktex 2.5, Memoir.


Any advice is appreciated!