where are you trying to place the pixel? which network...I would need to see your offer link and know which netwrok so i can tell how to set up a postback...it may be that you need to use a postback url...if so you need to take link out of the iframe pixel and then add this to the end of it ?subid= then you add the token that the network uses... you can pm me your pixel and offer link and ill tell you how...