[QUOTE=Cende;4408564]
 
Because I was never a premium player and didn't know about unlocking your IO's, I bought Performance Shifters and unlockers on the market instead of buying an invention licence. If I had know it before I was able to play with IO's on my great main caracter. 
 
 
 
There for I copy this from Paragon Wiki
 
Invention License (to buy on the market for 160 points)
 
An 
Invention License allows the ability to access the 
Invention System, including 
salvage and 
recipe drops, crafting and slotting 
Invention Origin Enhancements, utilizing the enhancement portion of already-slotted Invention Origin Enhancements, utilizing 
Set Bonuses, and crafting 
Invention Temporary Powers. Without this license, none of the above points are available. Invention powers already crafted will continue to be usable until all charges are expended. Likewise, invention costume pieces already crafted will continue to be available to the crafter, but further pieces cannot be crafted.
 
This item can be purchased at the 
Paragon Market for 160 
Paragon Points and lasts for 30 days. Purchasing this license will allow all characters on your account access to crafting Inventions from a recipe at any crafting table for 30 days from time of purchase. Without a valid Invention License, all IOs are "greyed out" and provide no enhancement value or set bonuses. 
NOTE: A character's already-slotted IOs are 
not deleted or otherwise "lost" if Invention System access is restricted. They are simply disabled. They may be removed via 
Power Respecification, or kept until earning the appropriate Paragon Reward, or to use while subscribing. It is commonly suggested to keep one 
character build with only 
Single-Origin Enhancements if planning on alternating between accessing and being restricted from the Invention System. 
 
I hope this information is usefull for some of you...
 
Mutschie