After killing the first dragon i ididnt get the dragons soull. Waht am i doing wrooooooong :

Fast travel away then fast travel back. see if it works.

Nope that won't work because it's this bug.

http://afkmods.iguanadons.net/index.php?/topic/3791-dragon-rising-quest-mq104-stage-85-unable-to-complete/

Do you have the Unofficial patch installed and the Dragonborn DLC?

indeed fast travel and fast travel back

it is even more fun when death dragons keep falling out of the sky

a event i had once when during 2 hours of playing i had 4 death dragons falling out of the sky in front of me and i do not mean their skeleton, , but freshly slained dragons and each time they gave me a soul

never happened again tho

It would seem that you're not Dragonborn after all!

Yay Dragons won't ruin his game!

unofficial patch seems to be the problem. Thanks guys

If you have the USKP, Dragonborn, but not the UDBP (or the UDBP in the wrong place in your load order) this is likely to happen, if you have all relevant unofficial patches in the right order it should be fixed.

Uncheck the patch then recheck and fight him again. Should work from your last autosave

Yep, that's usually the case.