GroupControl - BackColor does not change

I am using a DevExpress GroupControl of 16.1, but when trying to change the background color (backcolor) it continues with the default color, anyone know why? or am I doing wrong?

        // 
        // groupControl2
        // 
        this.groupControl2.Appearance.BackColor = System.Drawing.Color.DarkRed;
        this.groupControl2.Appearance.Options.UseBackColor = true;
        this.groupControl2.Location = new System.Drawing.Point(346, 314);
        this.groupControl2.Name = "groupControl2";
        this.groupControl2.Size = new System.Drawing.Size(308, 156);
        this.groupControl2.TabIndex = 60;
        this.groupControl2.Text = "Fiscal";