Doesn't grab listings

using tv_grab_na on a linux platform, I have suddenly
begun to get the following output:

unretry-able error reading schedule for 2004-5-30 for
station 2 WATC
zap2it page format looks okay, but no programs found
(no available data yet ?)
unretry-able error reading schedule for 2004-5-30 for
station 3 WSB
zap2it page format looks okay, but no programs found
(no available data yet ?)
unretry-able error reading schedule for 2004-5-30 for
station 4 WAGA
zap2it page format looks okay, but no programs found
(no available data yet ?)
unretry-able error reading schedule for 2004-5-30 for
station 6 WXIA
zap2it page format looks okay, but no programs found
(no available data yet ?)
unretry-able error reading schedule for 2004-5-30 for
station 7 WTBS

this goes on for every channel.