MySQL ошибка Illegal mix of collations for operation 'like' - Visual Basic .NET

SELECT * FROM tablename WHERE columnname LIKE %любой текст на кириллице%

Public Function BuildConnectionString() As String
        Dim Builder As New MySqlConnectionStringBuilder
        With Builder
            .ConnectionProtocol = MySqlConnectionProtocol.Tcp
            .Database = "somebdname"
            .Password = "anypassword"
            .UserID = "username"
            .Server = "servername"           
            .SqlServerMode = True
            .Port = 3306         
            .Keepalive = 10
            .ConnectionTimeout = 5
            .AllowBatch = True
            .SslMode = MySqlSslMode.Preferred
            .Logging = True
            .Pooling = False
            .CharacterSet = "cp1251"
            .TreatBlobsAsUTF8 = True
        End With
        Return Builder.ConnectionString
    End Function