LG TV binding Netcast and CHANNEL_CURRENTPROG

Hi to all
i want to command my LG TV.
My items are:

Switch LgTvPower                        "Power Command"                 (GF_Living)     {lgtv="ON:wohnzimmer:POWER"}
Switch LgTvMute                         "Mute"                          (GF_Living)     {lgtv="ON:wohnzimmer:KEY_MUTE, OFF:wohnzimmer:KEY_MUTE"}
Number LgTvVolume                       "lgVolume [%.1f]"               (GF_Living)     {lgtv="INIT:wohnzimmer:VOLUME_CURRENT, INCREASE:wohnzimmer:VOLUME_UP, DECREASE:wohnzimmer:VOLUME_DOWN, *:wohnzimmer:VOLUME_SET"}
Number LgTvChannel                      "Channel [%.1f]"                (GF_Living)     {lgtv="INIT:wohnzimmer:CHANNEL_CURRENTNUMBER, INCREASE:wohnzimmer:CHANNEL_UP, DECREASE:wohnzimmer:CHANNEL_DOWN, *:wohnzimmer:CHANNEL_SET" }
String LgTvChannelName                  "Channelname [%s]"              (GF_Living)     {lgtv="INIT:wohnzimmer:CHANNEL_CURRENTNAME"}
String LgTvGetChannels                  "getchannels [%s]"              (GF_Living)     {lgtv="INIT:wohnzimmer:GET_CHANNELS, ON:wohnzimmer:GET_CHANNELS"}
String LgTvGetApps                      "getapps [%s]"                  (GF_Living)     {lgtv="INIT:wohnzimmer:GET_APPS, ON:wohnzimmer:GET_APPS"}
String LgTvProg                         "prog [%s]"                     (GF_Living)     {lgtv="INIT:wohnzimmer:CHANNEL_CURRENTPROG"}
String LgTvAppExecute                   "excuteapp"                     (GF_Living)     {lgtv="*:wohnzimmer:APP_EXECUTE"}
String LgTvAppTerminate                 "terminateapp"                  (GF_Living)     {lgtv="*:wohnzimmer:APP_TERMINATE"}
Switch LgTvConnStatus                   "connstatus "                   (GF_Living)     {lgtv="*:wohnzimmer:CONNECTION_STATUS"}
Switch LgTvRecord                       "Record"                        (GF_Living)     {lgtv="ON:wohnzimmer:KEY_RECORD"}
Switch LgTvUp                           "Up"                            (GF_Living)     {lgtv="ON:wohnzimmer:KEY_UP"}
Switch LgTvDown                         "Down"                          (GF_Living)     {lgtv="ON:wohnzimmer:KEY_DOWN"}
Switch LgTvLeft                         "Left"                          (GF_Living)     {lgtv="ON:wohnzimmer:KEY_LEFT"}
Switch LgTvRight                        "Right"                         (GF_Living)     {lgtv="ON:wohnzimmer:KEY_RIGHT"}
Switch LgTvOK                           "Ok"                            (GF_Living)     {lgtv="ON:wohnzimmer:KEY_OK"}
Switch LgTvHome                         "Home"                          (GF_Living)     {lgtv="ON:wohnzimmer:KEY_HOME"}

and my sitemap:

sitemap Salone label="SALONE" {


		Frame label="Tv"
    {
        Switch item=LgTvConnStatus
        Switch item=LgTvPower mappings=[ON="Power Off"]
        Setpoint item=LgTvChannel minValue=0 maxValue=300 step=1.0
        Setpoint item=LgTvVolume minValue=0 maxValue=100 step=1.0 icon="volume"
        Switch item=LgTvMute mappings=[ON="Mute"]
        Text item=LgTvChannelName
        Selection item=LgTvChannel mappings=[1="RAI1",2="RAI2",3="RAI3",4="RETE 4",5="CANALE 5",6="ITALIA1",7="LA7",8="CANALE8",9="NOVE",10="TELENORBA",20="20 MEDIASET",21="RAI4",22="IRIS",23="RAI5",24="RAI MOVIE",25="RAI PREMIUM",26="CIELO",27="PARAMOUNT CHANNEL",29="LA7d",30="LA5",31="REAL TIME"]
	    Text item=LgTvProg
	}
        Frame label="Menu TV"  {
		Switch item=LgTvRecord mappings=[ON="Record"] icon="record"
	    Switch item=LgTvHome mappings=[ON="HOME"] icon="home"
		Switch item=LgTvUp mappings=[ON="Up"] icon="up"
		Switch item=LgTvLeft mappings=[ON="Left"] icon="left"
		Switch item=LgTvDown mappings=[ON="Down"] icon="down"
		Switch item=LgTvRight mappings=[ON="Right"] icon="right"
		Switch item=LgTvOK mappings=[ON="Ok"]
	
    }
Frame label="Camera" {

        Text label=Camera icon="camera" {

                Frame label="Camera" {

                      Video url="http://admin:fzonno12091977@192.168.0.103:80/video2.mjpg?user=admin&password=fzonno12091977" encoding="mjpeg"               
						 
                                      }
                                        }

                        }
        
		
			}
		
  

when i lunch openhab all work but the item “prog” don’t update correctly.
I have the refresh of the item only when i reload the file (.sitemap or . item)
Can you help me pls