You need to provide more information.... A9LH is just the method used to launch hacks and is not a CFW, so i'm assuming your on Luma3DS CFW?
Is there an error message displayed when you try to launch it?
How does it behave, is it freezing your 3DS, or just crashing back to homescreen?
Are you on sysNAND or emuNAND?
I've been told sometimes you need to open MiiMaker at least once before using friends list (asuming to initialise Mii data, i'm not sure)