SQL Server Newbie Question

I have SQL Server 2000 installed on XP Pro and I am having problems connecting from an ASP.Net application.





The DB in question was exported from my laptop, which is running MSDE on Windows 2000. On that machine Trusted_Connection=true seems to work from the ASP.Net application whereas the SQL Server login that I set up does not.





Now that the DB has been imported to my XP machine, Trusted_Connection=true no longer seems to work. I am assuming that this may be related to the same problem I had when I was trying to use system logs - the ASPNET user does not have the same privileges on XP as it does on 2000.





In any case, I'm not too concerned at the moment how I connect, just as long as I am able. So, I again tried using the SQL login I had set up with no success.





(I added the SQL Login at the server level then I added it at the DB level and granted it public, db_datareader and db_datawriter access. Later, when that didn't work, I also granted it db_owner rights. Still no success. (BTW, I remembered to repeat these steps on my XP machine once I had imported the DB.))





Then I thought to try using 'sa'. To make sure I that remembered the sa password, I logged into Enterprise Manager (which, I assume uses Windows authentication) and changed it. Then, I went over to Web Data Administrator and tried to log in, using the SQL Login option, with sa and the password that I had just set - IT DIDN'T WORK.





Am I going mad, or is there something I'm missing?





Thanks


Martin