I've got one last idea. Are you sure that you're passing the value in the correct format? Since you've got the 514 inside of quotes, that would cause Perl to treat it as a string. Also, I'm guessing that from the link you provided that Active Directory may be dealing with hexadecimal numbers. If you provide it with 514 and it treats that as a hexadecimal value, it could be interpreting your request as saying that you want to set the account to be a "NORMAL_ACCOUNT" and a "TEMP_DUPLICATE_ACCOUNT" at the same time.

Again, not saying that this is the reason behind the errors, but it might be worth a shot to try dropping the double-quotes around the 514 to see what happens.