Guess you were scammed. There is no such thing like a "lifetime" membership:
Read here:
http://www.gnutellaforums.com/showthread.php?t=28751

Lime Wire should only be downloaded (the basic version is free and the PRO version is $ 18.88 with 6 month of update and tech support) from here:
http://www.limewire.com/

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"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"