Doesn't have any twist in it as it came out of the package, or doesn't have any twist to get the brace height you need?
hopefully the first one. I have never heard of a string not having any twists. Is it one of the materials that has a heat activated bonding agent to stick it together? (angel majesty?) Can you pull the strands apart?
As a generality, endless loop strings require less twist than flemish. But you're still looking at 1 rotation every 3 inches at a minimum. Put it on the bow and start twisting until you get into the correct range for brace height.
If its the second one, I would just get a different string, or as suggested try making your own.