I own a DS Lite and an R4 card (have had the R4 for over a year now and it was working perfectly prior)-- the R4 card is a "R4 Upgrade Revolution for DS" (the site provided on the R4 card is www.R4i-SDHC.com), and the microSD card is a Sandisk one. Recently, my R4 has been acting strangely. When...