Incompatible Memory with my Z600 ?

Dear all,

I have a Z600 V1

I ordered

24GB (3X8GB) DDR3 1333MHz REG ECC MEMORY RAM FX622AA FR  (PC3-10600R)

Buffering / Ecc: ECC Registered

(I decided to start with them first in order to be sure)

And unfortunately, It was a good idea to buy 24GB first because, they didn't work.

And I swear, I sent emails to the seller in order to make the good choice... and of course...  I trusted him.. and of course...I was wrong

So, any chance to see them working on my Z600 ? 

What am I supposed to do now ?  Selling them? 

If you have any idea ?  

BTW, I live in Belgium...  So it Could be hard to order new memoy from another country with Duty Fee...

Many thanks for reading this post.

Regards