Hi Bud Boy
The reason for the lack of aroma, could be down to the fact that many strains will go through possibly 1, 2, or even 3 PHASES.
The PHASES are when the pistels (hairs) appear to die, from the bottom - up.
In theory, the plant has prematurely matured, having swollen the bud and produced some crystals.
Depending at what point in this process the plant is in, can make a big difference in aroma.
I've had it, where they seemed to smell every other day!!!
All I can say is that different strains, behave in different ways - you may find it helpfull to look into more information regarding your particular strain.
Good luck... and don't worry, as long as they look healthy,... your doing alright!
The Skinmaster