Time Loop

I am trying to get an asp working which will loop every 30 minutes. Then take a copy of one file from one server and place the date/time now() in front of the file before writing it to another.I tried it on my laptop at work just by checking if the file exsits but seem to have trouble encoding with unc paths.
[code]
<%
Set fs=Server.CreateObject("Scripting.FileSystemObject")

If (fs.FileExists("viper3 vdatainfosystv2502vinfotv32.exe"))=true Then
Response.Write("The system is offline for essential data load")
Else
Response.Write("File exists.")
End If

set fs=nothing
%>
[code]