Psexec execute a vbs remotely without username or password

Hi,

I need to be able to run a script with PsExec without specifiyng username or password

here it is.

the process is to extend a virtual drive ona remote server.

First I run the batch file:

doexpand.cmd server e:\

@echo off
---
set SERVER=%1
set PARTITION=%2

C:\bootini\PsTools\PsExec.exe \\%SERVER% cscript "\\10.66.66.49\bootini\extend\"extendvb.vbs %PARTITION%""
---

the extendvb runs fine locally.

But when I use the psexec, it says:

C:\Users\malabelle\Desktop\tests\extend>doexpand.cmd SEQDEV3 e:\
PsExec v1.98 - Execute processes remotely
Copyright (C) 2001-2010 Mark Russinovich
Sysinternals - www.sysinternals.com

Microsoft (R) Windows Script Host Version 5.6
Copyright (C) Microsoft Corporation 1996-2001. All rights reserved.

CScript Error: Loading script "\\10.66.66.49\bootini\extend\extendvb.vbs" failed
 (Access is denied. ).
cscript exited on SEQDEV3 with error code 1.

I check the share and it works and the permissions are good.

any ideas?