Bug ret paladin weapons

I have a ret paladin lvl 67 and everytime I want to use a new WEAPON (single or double handed) I keep getting MISS, not only for auto attacks, also for spells. I want to know if there is an issue and how to solve this please. I still have a 30 ilvl weapon and I want to change it for a better one. Thanks!

Sounds like you have not leveled up weapon skill. Attack your level mobs to raise it.