[Typo3] Mysql problem

[Claudio]

Hi,
I installed the quickstart on my ISP web server and I logon on 
/quickstart/typo3 I enetered with my admin login and password (even if I had 
to create a new one during the installation because the admin/password 
didn't work. The problem is that a do not see th page tree and any other 
informnation on the web site quickstart... maybe is related to a warning 
that I have at the top of the web page and is:

Warning: mysql_list_dbs(): Unable to save MySQL query result in 
D:\Inetpub\webs\fastdateit\public\claudio\quickstart\typo3\t3lib\class.t3lib_db.php 
on line 874

Warning: mysql_fetch_object(): supplied argument is not a valid MySQL result 
resource in 
D:\Inetpub\webs\fastdateit\public\claudio\quickstart\typo3\t3lib\class.t3lib_db.php 
on line 875

Can someone help me to understand what is this error ?

Thanks

Claudio