Hi - is there a way to find out which IOS (and their versions) that are currently installed on my Wii ?

I can play CoD MW Reflex on my Wii, but my friend can't. We are both using NeoGamma r8b15. We can both play The Conduit, and it's meant to use the same IOS55 as Reflex, so not sure why Reflex isn't working on my friend's Wii when The Conduit works fine.

I thought if we have a look a which IOSes are on each of our systems, it may help us figure out what is going on.

Cheers.