Sitebuilder 3.2 integration Error (Account not Found)

[fneto]

Hi I'm using the following Prodcuts:

Windows 2003 Server Standard
Plesk 8.1.1 for Windows
Sitebuilder 3.2 for Windows (installed as an standalone because the one that came with plesk didn't work)

Than I've created all the client users as sitebuilder users via plesk panel.

When I try to set any domain to be published with sitebuilder I receive the foloowing error:

Warning: Sitebuilder error:
Internal SiteBuilder error occured. Please contact the administrator (Account not found)

Does Anybody knows what should I do to solve this problem? Thanks!