Standalone installs of versions 3.1 and earlier installed MSDE v 1.0. If MSDE v1.0 is installed then the upgrade to version 7.5 standalone cannot be done.
With the release of version 7.5, the upgrade will no longer support the MSDE 1 install on a machine that was a Standalone install prior to version 3.2. In any of these options please backup the Filestore and the MSDE Database by using the Backup and Restore utility found within the ZAM toolkit on the Support website.
The upgrade code will fail and let the user know that the upgrade cannot be completed.
Once the MSDE 2 upgrade is complete then retry the ZAM 7.5 upgrade.
2. Upgrade MSDE 1 to an actual SQL server 2K installation within the environment. Do an Enterprise upgrade and then do the actual 7.5 upgrade.
3. Lose all of the data and do a fresh installation of ZAM 7.5 after doing a manual uninstall of MSDE 1. Please refer to Microsoft's website knowledgbase document: http://support.microsoft.com/default.aspx?scid=kb;en-us;276044
Reinstall fresh the version presently installed. This will also allow an install of MSDE 2. Use the Backup and Restsore utility to restore the database and then copy in the DOS copy of the backed up Filestore.