[RESOLVED] Error in casting a number

I hate to keep asking such newbie questions here, but...

I have my data reader working. However, whenever I try to work with integer values from the database, I get this err:

"When casting from a number, the value must be less than infinity"

Code:

---

                while (rdr.Read())
                {
                    int shift = (int)rdr["shift"];
                    string shift2 = shift.ToString();
                    int empnum = (int)rdr["empnum"];
                    string empnum2 = empnum.ToString();
                    string namel = (string)rdr["namel"];
                    string namef = (string)rdr["namef"];

                    MessageBox.Show(shift2 + " " + empnum2 + " " + namel + "," + namef);
                }

---

It happens at

int shift = (int)rdr["shift"];

the string casting works fine...

This worked

Code:

---

                    string shift = null;
                    shift = rdr["shift"].ToString();
                    string empnum = null;
                    empnum = rdr["empnum"].ToString();
                    string namel = (string)rdr["namel"];
                    string namef = (string)rdr["namef"];

---