Egyptian Mash Up wont load on server, switches back to normal before load

On Shockbyte, downloaded our super map and while loading the Egyptian Mash will blink, then go back to the normal Minecraft mash....and of course nothing looks like it should.  Its on all mash ups.  There sever is good, the versions are the same.  Lately on the main screen off the server the Egyptian background isn't even there.  ???  thanks