Can't attach model to bones in 3ds max 2012?

[Hunter-AP]

[del]I was following these tutorials [URL="https://www.youtube.com/watch?feature=player_embedded&v=GgfTFogmA4Q"]here[/URL] and [URL="https://www.youtube.com/playlist?list=PL0B9F96D035248AD5"]here[/URL] by Doktor Haus, but whenever I get to the part where he uses "Edit Envelopes" to attach things to bones, once I bring up the weight tool I can't select any bones from list the right side of the screen, even though I have the bones listed there. Somehow, Doktor Haus is able to get past this step, but I'm not even though I'm following his exact directions.

Anyone know of a workaround or fix for this?[/del]

Fixed by reinstalling service packs 1& 2 and update 12 for 3ds Max 2012.
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