ASP and IIS Permissions!!!

Hi guys, this is pretty bad. I'm new to this site and desperately hoping someone can help me out. Does anyone happen to know how to write to a remote computer via an ASP file? I think I get an authentication error. The ASP file is written in Javascript. When I try to run the following line:

var newFolderName2 = myFSO.CreateFolder( "z:\\test" );

I get the error:

HTTP 500.100 - Internal Server Error - ASP error
Internet Information Services
--------------------------------------------------------------------------------
Technical Information (for support personnel)
Error Type:
(0x80070056)
/tools/newPatient.asp, line 167

To make it more difficult, the mapped drive is a Unix box connected via Samba. When I try the UNC, it doesn't work either. The network is hosted by a Samba server connecting the Unix boxes to the Windows boxes. In the /etc/samba/smb.conf file, it the following has been entered:

[jpeg]
comment = try to make dirs here
path = /ody2/dir/jpeg/
public = yes
writable = yes
printable = no
valid users = Administrator, IUSR_SBSCOMP, IWAM_SBSCOMP
guest ok = no
force user = dir

Any comments? HELP!!! =( Even logged in as admin, I could not write it and I thought that IIS scripts authenticated via IUSR, but that didn't work either. I believe because the I***_SBSCOMP accounts are local to the server and not to the network. I was considering changing the anonymous access of the IIS default web site (where the script runs) to a different user from IUSR_<machinename>. However, I don't have the IUSR pwd, so this makes it very difficult to revert. If you are 100% sure this is what it is, please let me know. Otherwise, if you have any ideas, please help!
Sincerely,
MK

Another deja vu

Post your question only once, please