You need to turn off auto attack and auto target.
I know this is a pain as it makes you attack so much slower but only way to get LT to work.
Thanks
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Antrax MT 275 (Mage)
Jak Burton MT 275 (Sword)
Elmo MT 250 (Bow)
Stilnox 220 (PK)
Ejac DT - Retired.