How much did you pay for pro? Did you pay your money here http://www.limewire.com/english/content/download.shtml or at another site? See Membership? - **WARNING**- Download p2p Clients ONLY Thru Official Sites (click on link)

Normally, you'll be sent an email from customer support with a link to your personal pro downld page (which you should bookmark.) Check your email & also the junk folder.

After checking all the above options, see password not being accepted (click on link)