Reporting Services in WORKGROUP not working

Hi all,

I install the SQL Express advance edition in my Windows Server 2003 Standard Edition server, which is in WORKGROUP, not joining domain.

everything works fine, i set up reporting services and sorts.

i can access the report server using these URLs:
http://localhost/reports   or...
http://localhost/reports$SQLExpress

but why i can't access the report server using this URL?
http://ServerName/reports  or..
http://ServerName/reports$SQLExpress

when i use the last two URLs above (the one with the servername included), IE always prompt me for username and password.

anything i should check?

thanks!

---

AddinGanteng