I just performed a search for John Vishnoff using his Email address and found that John is no longer a member of the forum. You may; however, still be able to reach John using the Email address as shown on his Performer's Page, if the Email address is still active.
Most likely, John has been removed from the forum due to inactivity. When a member fails to login to the forum at least once in a two (2) year period of time, their account is deleted.
I perform this maintenance on a daily basis, so if any member intends to remain active, they must login to the forum at least once in a two (2) year time period, as stated above. This action renews the two (2) year period of time requirement for active membership.