Prompting Network Password

[Vivek]

Hi,

S/W: Project Server 2003
OS : Windows 2003 Server.

After all installation I configured the IIS by giving the
read&write permissions to 'IUSR_servername' for my default
site and the physical directory. And it worked just fine.
But after I installed Project Server 2003 service pack 1,
whenever I go to "certain" pages like "Manage Users" in
admin, I am prompted for Network login information.

I installed the project server in Single server mode. So
how can I make that prompt does not appear all the time?

Please help me.

Thanks in advance.