nginx-rtmp is slowing down the live broadcast

[Dihelson]

I installed nginx-rtmp-win32 on my windows PC in order to broadcast with OBS to multiplatforms.

I edited the config file, and inserted a line with my rtmp youtube settings and password
Run Nginx and saw that it is alive on the stats page of the browser, and run OBS. If I put the phrase: "rtmp://localhost:1935/live" on the custom rtmp service, OBS says unable to connect to server ( Apparently it doesn´t know where is my "localhost" ) , so, I put the IP 127.0.0.1 ( referring to the local machine ) and OBS indeed now connects to the Nginx server and I can see the stats in the page, but, unfortunatelly, the same problem happens: Nginx slows down broadcast ( say, from 3.5Mbps to a mere 800Kbps ). Youtube prepars to broadcast, but stays on yellow, signaling that connection is slow. I don´t know why this happens. My connection with the internet is 300Mbps and I have no issues when using OBS alone without the server.

There must be a problem with the use of "localhost". I tried from another machine on the LAN, and, in OBS I put the IP address of the server reffering to the internal IP:
rtmp://192.168.1.30:1935/live

Same problem again. OBS connects, but slowdown the "live" rtmp. I disabled firewall, anything you can imagine. I can´t understand what´s going on.
Win7 64 bit SP1, OBS above 22, 64 bit version, Machine: Intel i7 2600k overclocked to 4800Ghz, 16Gb ram, GTX980, SSDs, etc.
You can contact me ( Dihelson ) at: blogdocrato@hotmail.com