Error Loading UserControl - wpf

Question

I have created a new View in my WPF Application.
When I attempt to load the View, I receive the following errors:
"An unhandled excetion of type 'System.FormatException' occurred in mscorlib.dll"
"Additional Information: Input string was not in a correct format"
"When converting a string to DateTime, parse the string to take the date before putting each variable into the DateTime object."
I know it has something to do with the LINQ to SQL query in my ViewModel, because when I comment it out, everything works; however, there are no DateTime fields in my Model.
As you can see below the model is made of of strings, int, and bool values.
Any insight into this is greatly appreciated. Thank you for your time.
Model
{
public int ID { get; set; }
public Nullable<int> employeeNumber { get; set; }
public string userName { get; set; }
public string parentBranch { get; set; }
public string branch { get; set; }
public bool ATS { get; set; }
public bool website { get; set; }
public bool admin { get; set; }
public bool HR { get; set; }
public string timesheet { get; set; }
public string debug { get; set; }
}
View
<UserControl x:Class="Craig_Tools.ApplicationTrackingSystem.Views.Security"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:dg="clr-namespace:Craig_Tools.ApplicationTrackingSystem.userControls.datagrids"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<DockPanel>
<ContentControl DockPanel.Dock="Top" HorizontalAlignment="Stretch" VerticalAlignment="Top">
<dg:dg_security />
</ContentControl>
</DockPanel>
ViewModel
public partial class SecurityViewModel : ViewModelBase
{
public SecurityViewModel()
{
LoadSecurity();
}
public void LoadSecurity()
{
using (JobSeekersEntities db = new JobSeekersEntities())
{
var q = (from s in db.securities
select s).ToList();
securityList = new ObservableCollection<security>(q);
}
}
//ObservableCollections
private ObservableCollection<security> securityList;
public ObservableCollection<security> SecurityList
{
get { return securityList; }
set
{
securityList = value;
RaisePropertyChangedEvent("SecurityList");
}
}
//Constructors
private int selectedSecurity;
public int SelectedSecurity
{
get { return selectedSecurity; }
set
{
{ selectedSecurity = value; }
RaisePropertyChangedEvent("SelectedSecurity");
}
}
//Commands
}