Hi Dave,
Put the loop on but cut it quite short and then whip on with tying thread. Do not use superglue or the plastic sleeve that comes with the loop, use aquasure over the whippings instead, this will flex with the line rather than the line flexing against the plastic sleeve causing the line to crack.
Even better method but more time consuming is is to strip the coating off the last 1" of the line and whip back against the line to form loop then coat the whipping and the exposed core that is now your loop in aquasure, this is Paul Procters method and it works well.
Either way should eliminate the problem or at least give you longer before it occurs again.
Cheers
Ben