cannot implicitly convert model to viewmodel error

Question

{

public class FileManagerBL : GenericBL<FileManager>

{

public FileManagerBL() : base()

{

}

public FileManagerBL(Alcon.Data.AlconDataContext context) : base(context)

{

}

FileManager _objFileManager;

FileManagerBL _objFileManagerBL;

FileManagerVM _objFileManagerVM;

public FileManagerVM Insert(FileManagerVM _objFileManagerVM)

{

Alcon.Data.AlconDataContext db = new Data.AlconDataContext();

try

{

_objFileManagerBL = new FileManagerBL(db);

_objFileManager = new FileManager();

_objFileManagerVM = new FileManagerVM();

var FileManagerr = _objFileManagerVM.ToModel();

_objFileManager = _objFileManagerBL.Insert(FileManagerr);

//_objFileManager.BrokerID = _objFileManagerVM.BrokerId;

//_objFileManager.FamilyId = _objFileManagerVM.FamilyId;

//_objFileManager.FileName = _objFileManagerVM.FileName;

//_objFileManager.FilePath = _objFileManagerVM.FilePath;

//_objFileManager.IsDeleted = _objFileManagerVM.IsDeleted;

//FileManagerr.BrokerID = .ImageName;

//_objDocumentUploadVM.Image = _objDocumentUpload.ImageGUID;

//_objDocumentUploadVM.Client_Id = _objDocumentUpload.Client_Id;

//_objDocumentUploadVM.ID = _objDocumentUpload.ID;

return _objFileManagerr;

}  cannot implicitly convert model to viewmodel.. error occurred