Cant get to it..

[Amu610]

Today i was playing Fusion Fall. i was trying to get to Fusion Coops lair, to get the Megas nano,and it timed me. my computer takes a while for it to load, and when i finally get there, it tells me that i need to start from the beginning again. I do this several times but i dont get a different result. And today, i tried again, but when i finally got in i saw the timer and it was down to 63 seconds.