Login failed for user 'IIS APPPOOL\ during installation part 2

i am logged in as administrator on server 2008 r2
i have set up a folder in the sql for the store that i want to create a database for named geedesigns
i have installed nopcommerce to the point where i am able to continue installation via browser
i added my server name on page two of installation and use inegrated windows auth

on the third page of installation
i have checked to use an existing database . checked create simple data and dont check database exist
when i click next i receive this error message

An error occured: Cannot open database "geedeisgns" requested by the login. The login failed.
Login failed for user 'IIS APPPOOL\geedesignsjewelry'.
Running scripts from file: C:\inetpub\wwwroot\geedesignsjewelry\GeeCommerce\install\Scripts\nopCommerce_createDatabase.sql

I am stuck here and cannot install the product
i tried adding a user to iis in the iismanager under my site
i am stuck and dont know what to do next

Having a similar problem, downloaded ver 1.60 copied to server. When I run the install I get the first screen and click next. Then on the SQL Server page enter the server name, username and password then get 'Login failed for User' ..... error every single time and haven't managed to get around it!

Anyone help?

In IIS Manager Select application Pools.
Select the APP POOL associated with NOPCOMMERCE.
Right Click and select advance settings
In Identitiy, Add custom account (SQL account which has access to NOPCOMMERCE DB)
Click OK and reset iis and bingo!!

Add to your SQL logins, the account you want to connect with
Set the role as sysadmin

nakees; I changed mine to system and worked like a charm! thanks :)

thank you, I changed the mine to localsystem and worked out.