Edit the configuration file:
; MaxUser. The maximum number of simultaneous listeners allowed.
; Compute a reasonable value for your available upstream bandwidth (i.e. if
; you have 256kbps upload DSL, and want to broadcast at 24kbps, you would
; choose 256kbps/24kbps=10 maximum listeners.) Setting this value higher
; only wastes RAM and screws up your broadcast when more people connect
; than you can support.
Change MaxUser to 100