Hi everyone, I am really new at this and I made a very stupid mistake. My DSi XL is running on 1.4.3U firmware. Mi R4 SDHC Dual-Core flashcart worked perfectly fine, until I downloaded a filepack that I thought was an update for the cart. It wasn't. I ended up downgrading the flashcart to the 1.4.2 version and now the DS won't execute it, of course. I've been looking all around for a way to bring my cart back to the 1.4.3U supported firmware like it was before, with no luck. The website in the white/silver package for the cart is www.r4isdhc.com, and that is where I downloaded the "downgrade pack" from. I know this problem is the direct result of me not reading the entire bloody page before running a flash on my cartridge, and believe you me, I've learned that lesson well now. But I would still appreciate it if someone here has anything to offer to repair my cart before I just give up and buy a new one. Thanks in advance!