Ncurses Menu problem


I seem to be having a problem with the ncurses menu functions.
My program displays the menu fine until the number of rows exceeds 50 then
the menu will not display any rows.

Is this a hard coded limit in the menu library ?
Has anyone else had this problem ?
Is there a workaround ?
Is there an updated set of libs I can try ?

Thanks for the help
John Love
Tolltex, Inc.