Dear Popov and all,
I've tried all the method mentioned above. FST is still show not connect while MT4 (Vantage FX) shows connected.
I've tried below methods:
1. Delete cache files from MT4 compatibility files and reinstall MT4 and FST. Switch to single instance. MT4 connected but FST not connected.
2. Roll back to previous version of FST. MT4 connected but FST not connected.
3. Full removal of MT4 (Vantage Fx) and FST. And then fresh installation of latest MT4 and FST. MT4 connected but FST not connected.
One interesting finding is that my demo Oanda MT4 is doing perfectly fine. Can run multiple copies of FST without any problem. This lead me to wonder that something is wrong is VantageFX MT4 copy that I have. My VantageFX version is 4.00, build 432, 23 Aug 2012. Any other suggestions?
Thank you all.
Cheers.