New Post: Error Message when trying to create a tab

HI I tried to add a extra tab, now when I open a product I get this:

Error: is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: The 'prop' start tag on line 2 position 2 does not match the end tag of 'root'. Line 2, position 41. ---> System.Xml.XmlException: The 'prop' start tag on line 2 position 2 does not match the end tag of 'root'. Line 2, position 41. at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args) at System.Xml.XmlTextReaderImpl.ThrowTagMismatch(NodeData startTag) at System.Xml.XmlTextReaderImpl.ParseEndElement() at System.Xml.XmlTextReaderImpl.ParseElementContent() at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace) at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc) at System.Xml.XmlDocument.Load(XmlReader reader) at System.Xml.XmlDataDocument.Load(XmlReader reader) at System.Xml.XmlDocument.LoadXml(String xml) at NEvoWeb.Modules.NB_Store.SharedFunctions.getTokenPropXMLnode(String TagXMLString) at NEvoWeb.Modules.NB_Store.ProductTemplate.assignProperties(String TagString, Object obj, String IdPrefix) at NEvoWeb.Modules.NB_Store.ProductTemplate.InstantiateIn(Control container) at System.Web.UI.WebControls.DataList.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) at System.Web.UI.WebControls.DataList.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at NEvoWeb.Modules.NB_Store.ProductList.populateSP(Int32 ProdID) at NEvoWeb.Modules.NB_Store.ProductList.Page_Init(Object sender, EventArgs e) --- End of inner exception stack trace ---


this is what I did
Copy the contents of specificationstabxml.template into productxmldata.template and save it.
Then remove the comments around the two sections in productdetail.template and save.
Then set the specificationstab.flag to yes and save.

I tried to change it back but to no success.
Not sure what I did any help is appreciated