Registration error ????

[Schickle]

I wanted to register my 3 PC games . Unfortunately, all three serial numbers appear to be invalid .
Also I get the error message : Error 108: Lockout

Now, where is the mistake ??

The Games are all original

[VPaulus]

The lockout is always temporary. Please try again.

[Schickle]

I did this , but always comes back the same error

[VPaulus]

Then you need to contact support[at]slitherine.co.uk with your serial numbers and account details.