In the mauifrog softmodding guide, it mentions something about wiimotes purchased after a certain date might have compatibility issues.
Here's a quote from the guide:
"If your Wii Remote was purchased after November 2011, there is a chance that it may not be compatible with all Homebrew applications. Apps that were compiled prior to March 2012 are not compatible with these remotes. "
I don't know enough on the subject to give any personal speculation.