Username not logged in IIS when using forms authentication with Active Directory

[ThaYoung1!]

Hi!

I've succesfully implemented Forms Authentication with a Active
Directory, described at
http://msdn.microsoft.com/architect...l=/library/en-us/dnnetsec/html/SecNetHT02.asp.

Users which exist in a specific organisational unit within my Active
Directory can log in. There's only 1 problem. When I open my
webservers logfile it doesn't seem to log any user-information. When I
use windows authentication I can see the username in the logfile. When
I use the forms authentication described above I don't see the user's
name. Already added identity impersonate=true to the web.config. This
doesn't have any impact.

Can someone please help me?