GunZ won't launch

My friends Cyanide and Aiden have been helping me rebuild the 1.5 source to work with vs 2012. Everything seems okay except there's one error I'm getting in relation to this.

switch(ZGetLocale()->GetCountry()) {
case MC_JAPAN:
case MC_KOREA:
{
// ÀÎÁõ Á¤º¸ ¼¼ÆÃ
if( !ZGetLocale()->ParseArguments(pszArgs) )
return false;

// ¼­ºñ½º Á¾·ù¸¦ ¼³Á¤(ÇöÀç Å×½ºÆ®, ¸®¾ó ¼­ºñ½º µÎÁ¾·ù)
if( ((ZNetmarbleAuthInfo*)(ZGetLocale()->GetAuthInfo()))->GetIsAlpha() )
m_bLaunchTest = true;
return true;
}
break;

I can't figure out what's wrong with this to make GunZ refuse to launch. Any help would be greatly appreciated. :)

edit: by commenting if( !ZGetLocale()->ParseArguments(pszArgs) ) I can launch the game, but my client crashes at loading pictures.

What purpose does the switch serve anyway?

To be honest i'm quite sure. Maybe that has to do with the settings you put for compiling in the source? there's multiple settings like brz_release, kor, etc. Maybe the switch has to do with that.