Hi Rajee,
This appears to be a Windows folder permissions issue.
Recommend you create a new folder (i.e. c:\PDFDocs or something similar), not identified with any specific user and not in any special folders like Documents and Settings, or Users., Add Everyone - Full Control to the folder permissions, and then try to save your document in that new folder. If that works, then you will need to add the local MII Service user name (SAPServicexxxx) - Full Control to the folder permissions, and any other local or domain users that will need to access this folder, if you do not want to continue to use the Everyone permissions.
Regards, Steve