I've recently got Xbox live gold about a week ago and everything was perfect however I'm now unable to play in the crucible or join fireteams because it constantly searches for guardians and after a about 30mins it gives the error message Mongoose...Searching it didn't really provide any help, apparently NAT types are important but mine is optimal (Open).My latency is 300ms which seems slow but considering I played in the crucible effortlessly before it doesn't make sense for it to randomly become impossible to play. Please help my gold membership is going to waste and any advice would be greatly appreciated