Hi CoolP

Good to have you back on this thread and thanks for your great effort in learning us how to deal with this antique show! - As a matter of fact, I saw you the other day mentioned and praised in a CS 707-300 AVSIM review.  :)

The little thing has now start working here, digging itself all the way down to 05, within 3 minutes!
Profoundly going through your check list here, I realized that the Civas own Quick Guide has an error in their checklist, which turned out to fatally misguide me in my struggle to get things to work!
You  wrote:

- Enter the current position into both units (your data looks correct)

- Switch to DSRTK/STS, delete the error codes coming up after the self test with pressing and holding TEST


The Civa Quick Guide has unfortunately turned those same aspects into a wrong order:

- Check for Action/Malfunction codes moving the Data selector to DSRTK/STS position

- Rotate CDU Data Selector to the POS position

- Enter present position


So, this is what obviously caused the error!  >:(


PS. You need a proper version of Copenhagen Airport!
Here:
http://secure.simmarket.com/scansim-fly-to-ekch-copenhagen-airport.phtml
A nice one with atmospheric effects AND working jetways!  ;)
another company is currently working on their version, properly with their usual "hijacked" credit-jetways, I guess..!