Since there is no data and figure it is a bit difficult to say what is the problem, so just FYI you can parameterize the Beta distribution with mean and sd, as long as the sd satisfy that sd < (1-mu)*mu
Since there is no data and figure it is a bit difficult to say what is the problem, so just FYI you can parameterize the Beta distribution with mean and sd, as long as the sd satisfy that sd < (1-mu)*mu