Please Help! Rom trouble!

This is serious...i was playing Suikoden Tierkreis (E)(VENOM).nds on my R4 for 2 days, today i was about to go on the final battle and i decided to take a break then later when i tried to start the game it only showed both screens white and now it won't start and i feel like shit because i wanted to beat it, i worked so hard....NOW WHAT CAN I DO PLEASE HELP!!

https://www.romulation.org/forum/index.php?topic=1462.0

I had a similar problem with FFIV on my R4DS, the rom somehow got corrupted, I simply redownloaded it, kept my save file, when I replaced the rom with a new one it started just fine.

hmm ok i'll try both methods, thank you