Delete Statement With Parameters Not Working

When I debug my code I see the string going into the parameter correclty, but the the delete statement doesnt work and I'm not sure why. Does this look ok?  // Set up SqlCommand, connection to db, sql statement, etc.
SqlCommand DeleteCommand = new SqlCommand();
DeleteCommand.Connection = DBConnectionClass.myConnection;
DeleteCommand.CommandType = CommandType.Text;

// Store Primary Key photoID passed here from DeleteRows_Click
// in a parameter for DeleteCommand
SqlParameter DeletePrimaryKeyParam = new SqlParameter();
DeletePrimaryKeyParam.ParameterName = "@PhotoID";
DeletePrimaryKeyParam.Value = photoID.ToString();

// Insert new parameter into command object
DeleteCommand.Parameters.Add(DeletePrimaryKeyParam);

// Delete row, open connection, execute, close connection
DeleteCommand.CommandText = "Delete From Photo_TBL where PhotoID IN (@PhotoID)";
Response.Write(DeleteCommand.CommandText);
// DeleteCommand.Connection.Close();
DeleteCommand.Connection.Open();
DeleteCommand.ExecuteNonQuery();
DeleteCommand.Connection.Close();