Hi ! I tried to use Ebay Sell API for 2 weeks.

Today when i try to update an offer (who exist !) i can't with my developpment of the api but if i try with the api explorer it's perfectly working...

I get an OAuth false on my curl call and if i USE THIS TOKEN i can call the updateOffer on Api Explorer and update my offer. Why i can't on my application ?

I don't understand why it's so difficult to use the api :( ....

If someone have an idea, i really need help