Do you see any error in journal or in other terminal tab? ... I am not sure exactly but I was reading some suggestion about using same (or similar) broker with signal provider ... because if his broker/account is not ecn (sl and tp is placed on the same time with openning trade), but your broker/account is ecn (sl/tp is placed as the second step after openning the trade) so ...
Anyway - write to ServiceDesk or use Review of the signal to write/ask something
There is no need to modify sl/tp as a second step, even with ECN broker. (In fact Market execution order with can be used not only by ECN broker).
Maybe the OP doesn't check the "Copy Stop Loss and Take profit levels" in Signals options ?