Asked this question before via personal mail and got the following reply:-Rep Power is based on number of posts, reputations, how long you been here, and numerous other things. If you got lots of posts yet no one has given you enough positive reputations, you won't be able to get Rep Power and you won't gain a promotion to become a Respected Member, which in turn would give you a chance to give reputations to other members too. The green blob under your username shows you reputations.
well i have been a contributor to this forum since 2009 and its occured to me that my Rep power is still 0? However my profile shows i earned 40 in 2010 ( i think from memory).
I just changed my email address and now cant reply via email , hence this posting. Administrators can you please sort this out?