V-chip block on Jensen JE2269 Digital LCD_TV

Question

.We have the above described TV installed in our motor home.  We plug in to cable at RV Parks or use Dish satelite when cable is not available.  We receive all channels except when a sporting event comes on TBS a blue screen appears and the words "V-chip block   None" appears and we cannot view the sporting event. All other programming including commercials during the sporting event comes through on this channel.  We have checked the remote to the TV and the remote to the Dish and it appears that nothing is blocked as "OFF" appears next to types of programming that you can block.   We bought the motor home used so we dont have any passwords.  Any clues.