how to connect sky remote with tv?

my remote doesnt work with jvc tv. i pressed in the code and everyting and it works for couple of minutes then it stops working (and if i press in the code every time it works only for a few minutes). it works fine with the sky box. please help how do i fix it. it used to work fine before but then my partner done something to it, i think he took out the battries and left out for to long (as you have to put batteries back in within 10 minutes). anyway help