XmlDocument XmlNode.AppendChild(XmlNode) leaves out attributes

I am writing a C# Forms application that will edit an xml config file. I have a function that loads the current values into a DataGridView Control. They can then edit the current values or add more entries. I am having issue with adding more entries. I am using and XmlDocument object, making a call to CreateElement, giving the elements some attributes, then calling AppendChild on the parent I would like to add the child element to.

private void SaveMics_Click(object sender, EventArgs e)
{
	XmlDocument xDoc = new XmlDocument();
        xDoc.Load("MicData.xml");

        XmlNodeList mics = xDoc.GetElementsByTagName("mic");
        int micRow = 0;

        XmlNode microphones =
		xDoc.SelectSingleNode("/root/microphones");

        bool updating = true;

        foreach (DataGridViewRow row in dataGridView1.Rows)
        {

		/** Section Updates the entries already contained in the XMLDocument **/
                if (micRow < mics.Count && updating)
                {
                        mics[micRow].Attributes["number"].Value =
				row.Cells["micID"].Value.ToString();

                        mics[micRow].Attributes["cam1"].Value =
				row.Cells["cam1"].Value.ToString();

                        mics[micRow].Attributes["cam2"].Value =
				row.Cells["cam2"].Value.ToString();

                        mics[micRow].Attributes["cam1Pre"].Value =
				row.Cells["cam1Pre"].Value.ToString();

                        mics[micRow].Attributes["cam2Pre"].Value =
				row.Cells["cam2Pre"].Value.ToString();

                	micRow++;
                }

		/*************************************************************
				Here is where I add new Entries

		************************************************************/

		/** Section adds new entries to the XmlDocument **/
                else
                {
                    updating = false;//Set Flag because mics.count will increment

                    if (!row.IsNewRow)
                    {
		       // Create new element
                       XmlElement temp = xDoc.CreateElement("mic");

			//Create new attributes
                       XmlAttribute num = xDoc.CreateAttribute("number");
                       num.Value = row.Cells["micID"].Value.ToString();

                       XmlAttribute c1 = xDoc.CreateAttribute("cam1");
                       c1.Value = row.Cells["cam1"].Value.ToString();

                       XmlAttribute c2 = xDoc.CreateAttribute("cam2");
                       c2.Value = row.Cells["cam2"].Value.ToString();

                       XmlAttribute c1P = xDoc.CreateAttribute("cam1Pre");
                       c1P.Value = row.Cells["cam1Pre"].Value.ToString();

                       XmlAttribute c2P = xDoc.CreateAttribute("cam2Pre");
                       c2P.Value = row.Cells["cam2Pre"].Value.ToString();

			//Append Attributes to the element
                       temp.SetAttributeNode(num);
                       temp.SetAttributeNode(c1);
                       temp.SetAttributeNode(c2);
                       temp.SetAttributeNode(c1P);
                       temp.SetAttributeNode(c2P);

			/********   Not Properly Adding Element?
				Element is added without Attributes   ***********/
                       microphones.AppendChild(temp);

                    }
                }
       }
	/** If rows were removed inside dataGridView1, remove from XML **/
       if (micRow < mics.Count)
       {
            while (micRow < mics.Count)
            {
                 mics[micRow].RemoveAll();
                 micRow++;
            }
       }


      xDoc.Save("MicData.xml");

}
<?xml version="1.0" encoding="utf-8" ?><root><!--  List of Microphones --><microphones><mic number="1" cam1="3" cam2="4" cam1Pre="1" cam2Pre="1"/><mic number="2" cam1="3" cam2="4" cam1Pre="2" cam2Pre="2"/><mic number="3" cam1="3" cam2="4" cam1Pre="3" cam2Pre="3"/><mic number="4" cam1="3" cam2="4" cam1Pre="4" cam2Pre="4"/><mic number="5" cam1="1" cam2="2" cam1Pre="1" cam2Pre="1"/><mic number="6" cam1="1" cam2="2" cam1Pre="2" cam2Pre="2"/><mic number="7" cam1="1" cam2="2" cam1Pre="3" cam2Pre="3"/><mic number="8" cam1="1" cam2="2" cam1Pre="4" cam2Pre="4"/></microphones></root>
After Trying to add an element:
<?xml version="1.0" encoding="utf-8" ?><root><!--  List of Microphones --><microphones><mic number="1" cam1="3" cam2="4" cam1Pre="1" cam2Pre="1"/><mic number="2" cam1="3" cam2="4" cam1Pre="2" cam2Pre="2"/><mic number="3" cam1="3" cam2="4" cam1Pre="3" cam2Pre="3"/><mic number="4" cam1="3" cam2="4" cam1Pre="4" cam2Pre="4"/><mic number="5" cam1="1" cam2="2" cam1Pre="1" cam2Pre="1"/><mic number="6" cam1="1" cam2="2" cam1Pre="2" cam2Pre="2"/><mic number="7" cam1="1" cam2="2" cam1Pre="3" cam2Pre="3"/><mic number="8" cam1="1" cam2="2" cam1Pre="4" cam2Pre="4"/><mic /></microphones></root>