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There are two problems that I see: crossed shadows on your subject (see her neck), and two shadows on the background.
The cure for the first is to use one key light on your subject, and a weaker fill only if needed. Remember the adage that "there is only one sun."
The cure for the second is to light the background such that the subject isn't casting a shadow on it. Generally, placing two lights out of frame but at or behind the subject line works for this, but if you only have two lights, and need one for the key light, you can place the BG light above the subject and aim it down onto the BG. (Less desireable, IMO, is to have one BG light to one side, but it can work if you don't have a boom or scaffold for the BG light.) The further the subject is from the BG the further away your light can be, allowing a shallower angle that will yield less fall-off from top to bottom or side to side on the BG.
For closeups, you can put a single BG light directly behind the subject, but that won't work for full-body shots becasue you'll be able to see the light and/or the cables, so the BG light(s) must be out of frame.
The point is, though, that you need to light the subject and the BG seperately if you aren't using a black BG.
(Not a lighting issue, but while I'm here... Is that the full image, or just a crop from it? I ask, because you have a lot of empty space above her, but her feet are chopped off. Jsut somethig to watch for.)