Surely the main reason is that the catchement area is minute, there is a premiership and a championship team within 5 miles, both of whom are suffering falling gates, and a general amount of apathy in general.
I am a regular down there but when I ask anyone if they are going it's either I'm going Ewood/Turf or I'm off down pub to watch dodgy channel showing Man U/Liverpool/Chelski/Arse.
The only thing I can think of to increase the attendance is continuet he form we are in and they will end up in the crowd as at the end of th=it all everyone wants to be associated with a winner!
P.S. for a decent non-league forum try
http://606nonleague.proboards77.com/index.cgi