Delete row from another form

Delete row from another form

Hi,

I have a delete_form which have a field called -- TV Station . The TV Station field is the look up field from another form   Station_List .

Now when user select any station name from drop down list of Delete_form then  I want to delete this station from another form LPTV_form , where TV station is the lookup field of the  Station_List form also.

I have tried the below code but not working might be because  of two field are look up to another field 



if (input.TV_Station  !=  null) 
{

delete from LPTV_form [ Lptv_Station = input. TV_Station ];

}



please help me to fix it.