Forms Data Controls :: Retrieve And Display On Details View

I have a method that retreives data from table and needs to display in details view. The method is give below: The problem I am facing is I did put some break points to figure out if all the lines are executed but the problem I am facing is that the compiler is not going in the while(reader.read()) loop(I have made to loop bold so that would be easy to locate) and hence unable to retreive data.

public static Workstation GetWorkstationByName(string workstationName)
{
Workstation computer = new Workstation();
string key = "workstation_workstation_" + workstationName;
if (workstationName == null)
return null;
if (SiteUtility.Cache[key] == null)
{
string con = SiteProvider.Instance.AltirisConnectionString;
List<Workstation> workstationlist = new List<Workstation>();
SqlConnection cn = new SqlConnection(con);
SqlCommand cmd = new SqlCommand("Select [Server] from vComputer where Name = '@workstationName';", cn);
cn.Open();
cmd.Parameters.Add("@workstationName", SqlDbType.VarChar).Value = workstationName;
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
Workstation ws = new Workstation();
ws.Server = reader["Server"] as string;
workstationlist.Add(ws);
}
string ADSPath = "LDAP://" + SiteProvider.Instance.DomainString;..............