How to implement repository pattern to quartz job

We are using repository pattern in our mvc project. But I'm unable to implement service in quartz jobs. Here is the code;

 [DisallowConcurrentExecution]
public class DeleteContentsJob : IJob
{
    private readonly IAttachmentService attachmentService;
    public DeleteContentsJob(IAttachmentService attachmentService)
    {
        this.attachmentService = attachmentService;
    }
  public void Execute(IJobExecutionContext context)
    {
       var contentFiles = attachmentService.GetMany(cz, content.Id);

If I wrote this code, job doesnt fire. How can I call attachmentService.GetMany without problem?