I host a FTB Ultimate server off my computer. When i launch it two of my friends join and are able to play. But when i join it gives me a can't keep up error on the console and my minecraft freezes up and so does the server but when i'm finally able to inch my mouse over to the disconnect button and leave the server goes back to normal. Meanwhile im maintaining 50-60% cpu usage and 4g of ram out of 12g. Any ideas on a fix? This also just started recently i was able to play for about 3 days with no problem and than this started out of no where.