empty page in new fresh installation

[alf]

Hi, I just installed prestashop for first time. The backoffice works ok but when I go to the store website I get only empty pages.
I installed prestashop in a windows server. PHP5 is installed, and I get the following error in the event viewer each time I request a page from website.
Note the error is related with MS SQL Server, I dont know why prestashop pages are trying to connect with SQL Server.

Log Name: Application
Source: MSSQLSERVER
Date: 8/8/2009 2:44:04 PM
Event ID: 18456
Task Category: Logon
Level: Information
Keywords: Classic,Audit Failure
User: N/A
Computer: noname
Description:
Login failed for user 'sa'. Reason: An error occurred while evaluating the password. [CLIENT: xx.xx.xx.xx]
Event Xml:



18456
0
4
0x90000000000000

6434960
Application
noname



sa
Reason: An error occurred while evaluating the password.
[CLIENT: xx.xx.xx.xx]



any idea ?? Thanks

[alf]

solved. was permission in folder missing.
thanks anyway.