I fixed it. gamedaemons.net does not allow the upload of empty files so I filled pbucon.use with a bunch of jibberish and then uploaded it. All is ok now.
However, I don't get this return when I type admin pb_sv_uconlist in my server logs.
PunkBuster Client: [Slot] [Type] [Mask] [Name]
PunkBuster Client: 1 1 63.171.64.245 pbbans
PunkBuster Client: End of PB UCON Profile List (1 Entry)
1 LAST REQUEST
May I have the logs fowarded to ACI please?