can not initialize constructor

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ClassLibrary1
{
    public class Class1
    {
        public class Record
        {
            public int ssn; // Primary Key
            public String name;
            public double pay;
            Record(int newSSN, String newName, double newPay)
            {
                ssn = newSSN;
                name = newName;
                pay = newPay;
            }
        }
        //------------------------------
        public class RecordDB
        {
            private static int maxRecords = 200;
            private int numRecords = 0;
            private Record[] recordList = new Record[maxRecords];
            //-------------------------------------------
            public void insert(Record rec)
            {
                if (numRecords == maxRecords - 1)
                {
                    return;
                }
                printAll();
            }
            //-------------------------------------------
            public void delete(int newSSN)
            {
                printAll();
            }
            //-------------------------------------------
            //public Record search(int newSSN)
            public void search(int newSSN)
            {
                int first = 0, last = numRecords - 1;
                // Print All records
                printAll();

                //Record recx = new Record(30, "JohnX", 5000);
                //return recx;

            } // end of search function
            //------------------------------------------
            private void printAll() {
                Console.Write("---------------------------------");
                for (int i = 0; i < numRecords; i++)
                {
                    Console.Write("" + i + " " + recordList[i].ssn +
                    "  " + recordList[i].name + " " + recordList[i].pay);
                }
            }
            //------------------------------------------
        public static void main(String[] args)
        {
        RecordDB recDB = new RecordDB();

        recDB.insert(new Record(22, "Mike", 2500));//<-----------------Error

        }

        }
    }
}