Membership: Paypal sandbox works, live doesnt, settings same.

Still struggling to get this plugin to work. Am very close to giving up and going with a different plugin from a different company. I guess this is my last ditch effort to get help with it.

As it stands now, using Membership plugin 1.0.5, the plugin works in paypal test mode but does NOT work on paypal live mode. The user goes through the entire sign up process successfully and pays but cant login when returned to the site. It shows that they have signed up in the members area admin, but their membership is not being activated.

This process works in sandbox mode, but not in live mode. Any help would be greatly appreciated.