Am I using the incorrect version of Tekkit?

[Griponyourthroat]

I've just started playing Tekkit after watching some of the yogscast videos, And after about 30-40minutes of playing I mined so uranium and as from there video's i watched i saw it was worth 6 diamonds? But for me its only worth A diamond, Are they using an different version than me? If anyone knows what i can do to get to the same version as them it'd be greatly appreciated.

[iwolves]

They are using an older version