Having problems with Dragonborn.

I now have all three words to the "Dragon Aspect" shout , and one of the words for the "Bend Will" but when I try to activate them it says "dragon souls are rquired". Ive got 61 in the bank!

Any ideas??

You are perhaps pressing the wrong button?

You need to spend dragon souls to unlock the shout first.

Go to the shout in the menu and hit "x" to spend a soul for each word of a shout.