It's also possible that WISH-TV has stopped providing their Guide Data info to Tribune News Services. TNS is the company that actually delivers the Guide Data to our DVRs, along with Tivo and other DVR brands. So you might want to contact WISH-TV directly first.
Sony SAT-T60 120GB (v3.5b)
HR20-700, HR20-100, HR21-200 HD DVR
HR10-250 HD DVR 400GB (v6.4a)
H21-200 HD Receiver
R10 DVR 160GB (v6.4a)