Hi There,
There's a couple of ways to handle this issue:
1. You can try and troubleshoot the cause of the error. This error is typically when you're providing the proxy account information. Try:
--Enabling NetBIOS over TCP/IP for the main network adapter
--Ensure the Computer Browser Service is running
2. Alternatively, you can use AdminStudio to just condition out the custom action that validates the account information on the 'Next' button of the 'LogonInformation' dialog. You'd probably want to create a new transform for this using InstallShield.
I might also recommend giving a call to our support dept., as they can likely help you get through the installation issue.
Regards,
Cary