Actually, wearing gear and using potions that increase your pickpocket success actually lowers it. It's a known bug, try removing your enchanted gear and trying it then.
edit: I'm not changing what I typed because I find it funny. Apparently today I'm employed by the department of redundancy department.
Where did you hear this? It makes a little sense to me after what's been happening in my game.
My pickpocket skill is at 100. I have an enchanted Necklace that fortifies 35%, a ring that fortifies 20%, and gaunlets that fortify another 35%. That's 90%!!
I also have the last two perks where you are supposed to be able to pickpocket equiped items and weapons.
Here is my issue: With all the fortifies, perks and skill at 100, why is it that when I try to say.....pickpocket Lydia's steel armor......I only get 5% chance to pickpocket that item?
In my eyes I should be able to take anything I want from anyone whenever I please. What good is getting all these perks and fortifies if it doesn't make any difference?
I couldn't even steal a set of tavern clothes off of a sleeping Orc with all this!!