Error while trying to access Active Directory - AX 2009 -

Today I was trying to add some users by using the Microsoft Dynamics AX 2009  Active Directory Import Wizard and I got the following error:

Error while trying to access Active Directory

I went into a code (Forms/SysUserADUserImportWizard/searchADUser) and I saw that the Active Directory searcher will break into this line:

searchResultCollection = directorySearcher.FindAll();