Looks like an error in your goverments "clean internet campaign", better known as internet censorship. Bplaced works just fine, that 403 you get is a fake message brought to you by your goverments firewall.
Sorry, but there is nothing that could be done about that, maybe except leaving the country (complaining about censorship in korea won't be such a good idea, if you know what i mean...).
If so... I can found this solution for a problem.
Because if you right, it was unexpectedly slack!
+I did it
I used a detour site, and I can in wiki. yeah!