SSTP VPN Windows 7 client problem

Hi
I configured SSTP on my Mikrotik it works fine from windows 10 but from Windows 7 i have an error 0x8007274C: Error 0x8007274C: A connection attempt failed because the connected party did not properly respond after a period of time, or established failed because connected host has failed to respond".
SSTP VPN on mikrotik is set on diferent port not 443 but in windows 7 ( also WIndows 10 ) i configured it on ipaddress:port what is the problem ? But on WIndows 7 is not connecting ;//

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