porfolio server install problem 'NT Authority\anonymous logon'

[Amy]

I have just finished installing portfolio server on the same server that I
am running project server. SQL 2005 is located on another machine. when i
launch http://localhost/portfolioserver I receive a login failed for user
'NT Authority\anonymous logon'. when I look at the sql server logs, sure
enough, I see that the SQL server denied anonymous logon from my client
machine to the instance where portfolio is installed. what have i
misconfigured? why is is using anonymous for the logon instead of who I am
truely logged in as (the account that installed portfolio)?

any help would be appreciated.

thanks

amy