Your 3DS needs a little feeding, and Nintendo have the latest nourishment to replenish the portable hardware with the latest system update.
Released on March 25th, the firmware takes the Nintendo 3DS up to version 5.0.0-11 after hovering in the 4s throughout last year. Changes include the ability to run the "Download Later" feature without closing the eShop app and the ability to download software update in the background, like on Wii U.
As usual there have been "further improvements to overall system stability" to improve the user experience.
Have you download the latest firmware update for Nintendo 3DS?