Stops after: "Started saving."

[crazysmiley1]

Hey,

I'm from a minecraft server community and I'm a renderer there. I need the world for making renders so I use this mod.
It worked fine a long time but a few weeks ago, it didnt worked for me anymore.
Many other renderers on the server I'm playing on have the same problem as me!

The problem:
After I pressed: "Stop downloading"
the chat tells me: Download completed. Start saving.
After these messages it stops and I can wait hours and nothing happens. The "Saving..." Message is not showing up.
When I now quit mc and go to my saves folder, I can see the 2 files, but I can't see them ingame...

The ip is play.wynncraft.com if you want to test it yourself. I eould be happy if you can help me as fast as you can because it would really help our community :)

Ps: I already re-installed Minecraft COMPLETELY and it was still the same error...

Thank you in advance :)

It's happened to me too! I trying to fix that something like 3 hours!

[alzdoesmc]

I figured out that you should use the LiteLoader or Vanilla version for 1.7.10. I'm thinking that it only happens on MC 1.7.2, because that's the only time those errors occurred.