As far as I can see, your document is trying to make a SQL Server connection with the account the reload job is currently running under (Windows authentication). You as a user seem to have sufficient access rights to the database, but the account running the QlikView Distribution Service (aka service account) has not.
If you don't have a publisher, you can use the Section Access fields on the Reload tab to provide another account to make your connection. Try with your own credentials.
The best solution however is to grant your service account enough privileges to access the database. You can ask your dba.