Constant permission denied error on VBS script

Question

The file is created and copied to the network share but I need this to run without errors as I need to push out to users quietly. Permissions have been set to full everyone. No errors when copy to local drive.

'Define variables, constants and objects 

'define text file and username 

Const ForAppending = 8 
Const OverwriteExisting = TRUE 

dim WSHNetwork, UserString 
set WSHNetwork = CreateObject("WScript.Network") 
UserString = WSHNetwork.UserName 

Set objFSO = CreateObject("Scripting.FileSystemObject") 
Set objTextFile = objFSO.OpenTextFile _ 
    ("" & UserString & ".txt", ForAppending, True) 

' rest 

strComputer="localhost" 
Const HKEY_USERS = &H80000003 
Set objWbem = GetObject("winmgmts:") 
Set objRegistry = GetObject("winmgmts://" & strComputer & "/root/default:StdRegProv") 
Set objWMIService = GetObject("winmgmts:"  & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") 

'Go and get the currently logged on user by checking the owner of the Explorer.exe process.  

Set colProc = objWmiService.ExecQuery("Select Name from Win32_Process" & " Where Name='explorer.exe' and SessionID=0") 

If colProc.Count > 0 Then 
   For Each oProcess In colProc 
       oProcess.GetOwner sUser, sDomain 
   Next 
End If 

'Loop through the HKEY_USERS hive until (ignoring the .DEFAULT and _CLASSES trees) until we find the tree that 
'corresponds to the currently logged on user. 
lngRtn = objRegistry.EnumKey(HKEY_USERS, "", arrRegKeys)    

For Each strKey In arrRegKeys 
   If UCase(strKey) = ".DEFAULT" Or UCase(Right(strKey, 8)) = "_CLASSES" Then 
   Else 

       Set objSID = objWbem.Get("Win32_SID.SID='" & strKey & "'") 

'If the account name of the current sid we're checking matches the accountname we're looking for Then 
'enumerate the Network subtree 
       If objSID.accountname = sUser Then 
           regpath2enumerate = strkey & "\Network" 'strkey is the SID 
           objRegistry.enumkey hkey_users, regpath2enumerate, arrkeynames 

'If the array has elements, go and get the drives info from the registry 
           If Not (IsEmpty(arrkeynames)) Then 
               For Each subkey In arrkeynames 
                   regpath = strkey & "\Network\" & subkey 
                   regentry = "RemotePath" 
                   objRegistry.getstringvalue hkey_users, regpath, regentry, dapath 
                   objTextFile.WriteLine subkey & ":" & vbTab & dapath 
        Next 
                objTextFile.Close 
           End If 
       End If 
   End If 
Next 

Set objFSO = CreateObject("Scripting.FileSystemObject") 
objFSO.CopyFile ""& UserString & ".txt" , "\\server\testlog$\", OverwriteExisting
On error resume next
objFSO.CopyFile ""& UserString & ".txt" , "\\server\testlog$\", OverwriteExisting
If err <> 0 Then wsh.echo err.number,err.description