Using umbraco 6.1.3 with uComponents 5.4 and uMapper and am getting the following error

System.Reflection.AmbiguousMatchException: Ambiguous match found

this is when i try

Section section = uMapper.Find<Section>(sectionId);

my model looks like

    public class Section
{

    public int Page { get; set; }
    public string Name { get; set; }
    public string SectionSummary { get; set; }
}

My mapping in ApplicationStartupHandler looks like

        uMapper.CreateMap<Section>();
        uMapper.CachingEnabled = true;

I have doc type with Alias Section and 2 properties on it Page and SectionSummary I want Name to map to node.Name was thinking that would happen automagically?

Any ideas?

regards

Ismail