I posted a fix for this some pages back, there is a discrepancy between LootGear and LootCustom, where LootGear is set to ignore the area of the screen with the chat window, and LootCustom searches the entire screen. I seem to be having trouble with 'search' in these forums, but here's the quick fix. Search your script file for 'Func LootCustom', which is around line 1020, and replace the 'While _ImageSearchArea' line with this one:
This changes the search area to match that of LootGear().Code:While _ImageSearchArea($urlString, 1, 420 * $x_ratio, 0, Round(1690 * $x_ratio), Round(900 * $y_ratio), $gX, $gY, $accuracy)