Timer stops working after sometime in windows service - vb.net

Question

I have a windows service that runs every one minute and performs some DB and IO operations.
Everything works fine but I have observed that after some time service does not work.
It shows started but nothing is happening.
1) Can this be bcoz of timer being collected by GC? If yes then whats wrong with my code.
2) I have used timer.enable in onstart and onstop, should i use timer.start and timer.stop.
3) If I want to user Threading.Timer then what all do I need to change in the following code.
Any help will be appreciated
Imports System.ServiceProcess
Imports System.Timers
Imports System.Configuration
Public Class ReportingImmediate
Inherits ServiceBase
#Region "Members"
Private ReadOnly time As Timers.Timer
Private ReadOnly ReportingHelper As ReportingHelper
Private ReadOnly timeInterval As String
#End Region
Public Sub New()
' Initialize Logs
InitializeComponent()
' Initialize other components
time = New System.Timers.Timer()
timeInterval = ConfigurationManager.AppSettings("ImmediateReRunInterval")
time.Interval = Integer.Parse(timeInterval)
AddHandler time.Elapsed, AddressOf TimeElapsed
objReportingHelper = New ReportingHelper()
End Sub
#Region "Timer Event"
''' <summary>time Elapsed</summary>
''' <param name="sender">The object that raised the event sender</param>
''' <param name="e">Event data passed to the handler e</param>
Private Sub TimeElapsed(sender As Object, e As ElapsedEventArgs)
time.Enabled = False
objReportingHelper.GetReportsForExecutions(1)
' Enable the Timer
time.Enabled = True
time.Interval = Integer.Parse(timeInterval)
End Sub
#End Region
#Region "Service Events"
''' <summary>On Start</summary>
''' <param name="args">Arguments</param>
Protected Overrides Sub OnStart(args As String())
time.Enabled = True
End Sub
''' <summary>On Stop</summary>
Protected Overrides Sub OnStop()
time.Enabled = False
End Sub
#End Region
End Class