Getting an error when using MS Reporting

Question

I'm trying to use my simple data object:

internal class BRInfo
{
    public string Name { get; set; }
    public string Description { get; set; }
    public DateTime LastRun { get; set; }
    public string LastResult { get; set; }
    public string LastRunDetails { get; set; }
    public IList<string> DetailsList{ get; set;}
    public bool IsValid { get; set; }

public BRInfo()
{
    IsValid = true;
}

}

By using a TextBox for the Name and a List for the DetailsList. I'm returning an IList for the datasource.

The report generated just shows this for the DetailsList (#Error)

Error

Details List

Any thoughts on what is wrong here ? I can see the DetailsList being populated with data.

thanks Sunit