CreatedBy and ModifiedBy Search FullTextSqlQuery SharePoint 2010

Hi at all,

I've a problem. I'm using a fulltextsqlquery to retrieve the documents that I'm interested, but I see that the column CreatedBy and ModifiedBy are in blank, then, I've searched about it and I've found it:

http://www.sharepoint-insight.com/2009/04/01/how-to-search-on-last-modified-by-field-in-sharepoint-advanced-search/

I did it, and now, CreatedBy and ModifiedBy are correct but it's the SPUser.Name and I need SPUser.LoginName, for example, if the user is called Jack Nicholson and the user is j.nicholson this columns returns Jack Nicholson and I need j.nicholson.

Anyone knows how can I resolve it?

Thanks in advance,

Victor Cea

victor_depor@hotmail.com