4个wordpress域，2个工作但2个映射给出错误并且没有正确加载

Question

i have 4 domains to be use like this in wordpress:

        !-domain1.org (primary site in network)
        !
network !-domain2.com (setup as subdomain of domain1 then changed to be a domain)
        !       -domain3.com (it will show domain2.com but in spanish with polylang
        !       -domain4.com (it will show domain2.com but in portuguese with polylang

domain1 and domain2 load perfect in browser

but i cant make domain2 and domain3 to work

i use nginx and apache trought a tcp .sock on centos6

i have Mu domain mapping installed but in domain mapping what should i put my ip, domain1.org or domain2.com ??

and in nginx what needs to be done to point the domain3 and domain4 correctly to not get the no file found or 502 errors

i know this might be a noob question but i have been stuck for 2 days please help