To fix this error try the following:
1. Login to UPS.com
2. In the My UPS tab, click Login Settings
3. Copy the User ID. Make sure you note capitalization: this must match exactly.
4. In Admin - Return Centers, enter the UPS Username exactly as shown on the UPS site and save.
Also check the Account Number:
1. Log in to your account at the UPS website.
2. From the account menu in the top-right corner of the page, select Payment Options.
3. Under My payment methods, your account number will appear in the Number column (your account number is in a format similar to 123AB4).
Also see this article for setting up UPS accounts:
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