Run a method in a class multiple times ?

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C#

My program which transcodes audio submits tasks to a multithreaded service but no intensive tasks are proformed by my program, i have a class and a method which submits the conversion task Extract the audio > Submit the job > Wait until its finished

I want to run this method multiple times without the class values conflicting

Ive tried declaring a new instance of the class and running it with a backgroundworker like this

new ConversionProcess(Files);
                    var Slot1 = new BackgroundWorker();
                    Slot1.DoWork += ConversionProcess.Convert;
                    Slot1.RunWorkerAsync();  

This works for one instance but if i create a new instance and run it in another backgroundworker only the first instance runs.
Is there any way of doing this in c#

--class

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;

namespace AudioThreadingTest
{
    public class ConversionProcess
    {
        private static List<string> FileList;
        public static string AudioChannels;

        public ConversionProcess(List<string> ConstructorFileList)
        {
            FileList = ConstructorFileList;
        }

        public static void Convert(object Sender, DoWorkEventArgs DoWorkEventArgs)
        {
            foreach (var FileName in FileList)
            {
            new SourceHandler();
            new MP4Multiplexer();
            new ConversionLog();
            new JobEvaluate();
            new AACTranscoder();
            SourceHandler.GetStreamNames(FileName);
            SourceHandler.ExtractStreams(FileName);
            ConversionLog.AddToLog("Finished Extracting Source File.");
            AACTranscoder.CompressAudio(Stream);
            MP4Multiplexer.PackageMp4();
            }
        }
    }
}