Why Object Is Not Evaluating To Be Equal To True

I have a simple method which takes an Object and return string "No" or "Yes". Basically I want to display "Yes" or "No" when a bool value of 0 or 1 is there

<asp:TextBox ID="TextBox3" runat="server" MaxLength="50" Width="150px" Text='<%# Checkvalue(Eval("AustResident")) %>' />

But everytime there is a 1 passed to the CheckValue which in the debug shows as true, It never evaluates being equal to "true" what am I doing wrong? My Checkvalue is always returning "No" no matter what I pass.

protected string Checkvalue(object obj)
{
if (obj != null)
{
if (obj.Equals("true"))
{
return "Yes";
}
else
{
return "No";
}
}
else
{
return "No";
}
}