Hi--
Sorry I missed this. I just had a call from someone else who was having the same problem, and was searching here for a solution and found this.
It turns out that the problem is with the ARRL. The 503 error is a giveaway, but here is how you can prove to the ARRL that they have a problem. After you get the error, get the URL by right-clicking the IMPORT DIRECTLY FROM WEB button as described above.
Close LOGic, and paste the URL in any web browser. Your browser SHOULD download an ADIF file. But in this case you will get a 503 error with more detail than LOGic gives.
Please contact the ARRL. You can get their email address here.
http://www.arrl.org/contact-arrl Look under Logbook of the World.
Send them a copy of the URL and the response.
It seems to be account-related. I tried the URL trick with my login on both my computer and my customer's. They both worked. His URL would not work on either my machine or his.
We did not email the ARRL because it started working again.
If you CC me on the email, I can call them and follow up.
Tnx & 73,
Dennis WN4AZY