Perhaps i found another possibility for your problem
Here is a little patcher program you can try:
- start Kies, connect Tab, start patcher, enable spoof true
- in "Spoof Product Code as" dropdown select NEE (or other nordic version?), select it from dorpdown, not write it in with keyboard
- then tick write registry
change back to kies itself and klick: update firmware...
Et voila it works.....hoepfully :)
If you've got a ROM with the CSC for your country, you should first make sure your product code is correct for your country, and then you can flash the correct CSC with the ROM with ODIN.
If your product code is incorrect (like mine was), you should restore the backup of nv_data.bin (.nv_data.bak) in folder /efs. If that doesn't work, or you don't have a backup, and you know your nv_data.bin is damaged, you can try to repair it by hex editing it, like I have described above. This however probably shouldn't be done if you're not sure you know what you're doing, as it may among others damage your IMEI, preventing you not only from upgrading via Kies, but possibly also causing the Tab to be unable to call or use a data connection.
You can also try rodman01's method. I haven't tried it, but ir sounds promising.