Hacking Can't Load R4DS SDHC while charging DS?

[hopewithinchaos]

I just tried using my R4DS-III upgrade with MicroSDHC compatibility in my DS while it was charging, but it won't even read it. If it isn't charging it loads right up. but charging, it goes to the main DS screen and doesn't even detect the R4. Any advice if this is a glitch or if it is maybe just a hardware fault? Thanks in advance