You'll have to increase your receiving capacity. As far as I've understood this happens so the node that you're connected be able to know how many bitcoins there are left to be received (from your channel). In order to increase your receiving capacity click "Swap" and it'll show you some input fields. You can "convert" your sending capacity to receiving capacity.

If I've made a technical mistake in the first sentence above, I'd like to get a proper answer from a LN expert.