You may have received this error for a number of reasons. However, more than likely it's because your shipper number (Account Number) from the Shipping API was not added to your ups.com profile.
To verify you have the correct information in your ups.com profile:
- Log in to ups.com (Be sure to use the same User ID and Password that is in your Shipping API)
- Select Account Summary from the My UPS tab rollover menu.
- Verify that your account is listed; if not, select the Add a UPS Account link
- Follow the instructions to add the account