Charms "You cannot use this"

When I try to use a charm it says "You cannot use this." Why is this?

Thanks

Did you wipe your skills? If so, your "UseSkill" skill is gone.

I dont know if I did, how can I check/add it back in?

Code:

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&learnskill 29202

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would give you the skill.

Failed to learn skill, but the skill is in my activeskill.shn I even looked

Means you already have the skill. Problem is somewhere else, double check your SHNs.

Which shns? Everything I can think of I have checked