Trader is connected-disconnected
It must not happen. I have seen such issue very rear on my machines XP, win 7, and win 8. It was mostly caused from duplicated Connection Ids.
(It may happen even if there is no visible duplicated connections. FST or MT4 can be found working in background from some unknown reasons. Also I have seen duplications on VPS when different users are using same IDs. This was fixed I hope.)
I cannot fix a problem I cannot reproduce. You have to make a detailed report.
Please try to stop all Experts in MT4. Clean the Global Variables: Tools - Global Variables.
Restart the PC.
Delete MT4 log files.
Run one copy of FST on one chart.
Does Connect/Disconnect happen?
If so, please upload the strategy, the config.xml file, make a screenshot of expert output in MT4 output.
Upload also the last MT4-FST expert logs found in "C:\Program Files (x86)\FXCM MetaTrader 4\experts\files"
Also MT4 log file.