[BarelyB]

You could try pumping one breast at a time while lying on your side. I have to do that with the large domes.

Yeah i had this trouble in the beginning. Use a bobble/hair band or clip of some sort, bend the tubing and use one of these to hold it in place. Pump up one breast at a time. When you've got some decent swelling repeat the above but put both cups on one at a time and pump both. I know how frustrating it is in the beginning. I still find it tricky to keep suction sometimes.