hi, not a hijak as such but asking the same questions

I'm new to the Wii scene, but been using modded Xboxs
PSP and DS for some time, however...
i've tried burning a few games now using different software and different disc and can't get any to work..
i'ves used roxio but it seamed a bit temperamental, didn't like any of the disc i used (but the same disc work dine if i'm burning a movie oe somit).
So i went with my old fav alcohol 120 which burnt no probs at x4 speed
i've used TUFF DISC x8 -R, some unbranded
DVD's and DATASAFE x16 -R but the Wii still says unknown disc.
any pointer/help would be muchly appreciated
Mubz