Wii internet connection trouble

my wii is an ass.

Im not too savvy when it comes to firewalls and all that, but my ds has no problems going online and yet my wii refuses to connect to the internet 70% of the time (especially wii shop channel). is it a security thing or something much more sinister?

not sure if this the section I should be posting this in, I dont want to look like a n00b.