Yes. It means it was done incorrectly. I'm sorry to be blunt, but in the seven years I've played the game, the console has never given me problems when I entered it correctly.
Right-click on your desktop icon, and choose 'Properties'. In the 'Target' line, after the end where it has \vampire.exe" you type a single space after the quotation mark, and then -console
Then in the game, you just press the tilde (~) key above the left tab, and the console window opens up. The console commands can be found on many sites that have walkthroughs, FAQs, etc.
PS - Welcome to the forum kumanokage and The_Killer !