And Suddenly my R4 SDHC Freezes

Yes, i have an R4 SDHC at the Latest v1.32 firmware and I have a freezing Problem.
See, Before, i had just downloaded and played the new miles edgeworth game and I saved and turned it off to go take a shower.
Then I came back and I started my R4 up and it turned on normally. I pushed the first button to go to my games folder and when I selected it again to go to my games it just froze.How do i fix this? Do I need to re-format my card?

Backing up your files and formatting your card would be the first place to start.