System security access

I have developed on NET-OS6.0 with ConnectME.
I was porting my software to NET-OS6.3 since I received updated environment.
Then I evaluated my software on 6.3.
System security access function was not work (Basic web server).
After that, I tried nahttp example application on 6.3.
Id and password popup window did not appear too.
The other hand, it worked on ftp.
System security access function on basic web server is not supported on 6.3?
Would you check this issue?