lacp admin key connect to HP procurve 5308xl

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Hi

We want connect a 6400 as edge switch to a Core switch ( hp Procurve 5308 xl) i thought dynamic link aggregation is the right way. Im searching on Hp side ,i found this:

interface F17-F20 lacp active

but notihing with admin key or something. have somebody experience with this and know the best way to connect alcatel und hp switch?

Thanks for help

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Update

The last day we do some test with the hp switch and the link is working.

On hp:
trunk h14, f14 Trk1 lacp

On the 6400 create a dyn. linkagg and we set brigde mode flat with rstp


Than we connect the link and the link is up.