How to send a key to a keyserver?

[Helmut Waitzmann]

Xavier Maillard <xavier at maillard.im> writes:

>Helmut Waitzmann <ml.throttle at xoxy.net> writes:

>> gpg2 --verbose --keyserver hkp://pool.sks-keyservers.net --send-keys -- 72ABFF0923A87CF22D0ED7C4FDEE765D017077F1
>
>try without the -- stuff:
>
>gpg2 --verbose --keyserver hkp://pool.sks-keyservers.net --send-keys 72ABFF0923A87CF22D0ED7C4FDEE765D017077F1

Same error as before.  What else could I do?