Open windows explorer and browse to the db folder which is generated
in the folder you chose for your asp files.
e.g c:\inetpub\wwwroot\inetpub\mySite\db
Right click on this folder and select properties
Click the security tab and click Add

select the IUSR_[MachineName] and click Add
Now Click OK and you are back to the security tab

Make sure the internet guest account has at least modify read
and write permissions.
If you have generated .NET code then repeat the above process
this time adding the ASPNET account.