oavs:
Ok One solution was to upload the complete new 'zcadmin' with untouched/edited files then , re name your existing 'admin' to '_admin' then change the newly uploaded admin folder name to 'YOUR_OWN_ADMIN' on the server (after receiving onscreen ALERT) worked. Which indicates some sort of permission problem but to my surprise no one can tell me.
It works now..
It would be nice to know what made it worked
Good Day Mate
Did you take a look-see into your logs / cache folder and checked for error messages? It would have given you a clue. If they still exist, it may be worth checking them just for interest sake.
My guess, from past experience, is that you had a corrupted file, could have been just a missing closing } bracket or similar. When you re-uploaded the admin files that corrupted file would have been replaced by a healthy file and it fixed your problem.
Unlikely that the permissions were the culprit.
Cheers from up the road
Frank
NOTE: We are sorry that Frank is no longer with us.
We are grateful for all his contributions to the Zen Cart community.