Setting Permissions In Sql Server 2005 For Asp User Account

How would Set permissions
  Sql
  Server 2005 so that I can access a
  asp page created in VWD and Sql Express.
 
On the production server i have just the one instance of Sql
 
I have the following connection string in the web config file:

 

<
connectionStrings
>


        <
add

name
=
"
ConnectionString"

connectionString
="
server=serversNameXPRESS;uid=aspuser;pwd=aspuserPassworkd;database=DATABName"
/>


    </
connectionStrings
>
 
The account i setup to access the db in Sql 2005 Proper on the Production serve is Represented by the name in the above example as “aspuser�. I created this user in security, logins. And
  I gave permissions to this on the Db level “create procedure
  delete, select, update insert.â€?
 
I get a error when i run the page in the browser that
  says “login failed for aspuser.â€?
 
I know virtual directory is configured properly. I can run aspx page in the directory with out a db connection, without and error.
 
Any help would be greatly appreciated.