TAPI Driver not working at all

[Akebono]

This is my log after having placed a call to 3CX VOIP Client. As you can see, incoming calls are not detected at all. How come?

ExceleTel TeleTools v3.7.1.2
Create etLine
Address.ID := 0
Address.Count = 1
Address.Name = 'PPPoE VPN'
TeleScope.Visible := True
DevEnv := deDelphi
Device.Configure
<< Error >> LINEERR_OPERATIONUNAVAIL [80000049]
Device.Configure - Returned = False
Device.ID := 6
Device.Count = 7
Address.ID := 0
Address.Count = 1
Address.Name = 'Address.ID = 0 <Name not available>'
Device.Name = '3CX VoIP Client'
Log.TimeStamp := True
57:49.406 Device.Active := True
Device.Count = 7
Device.ID = 6
Device.Name = '3CX VoIP Client'
57:49.421 CallBackInstance = 00EC1CEC
57:49.437 Address.ID := 0
Address.Count = 1
Address.Name = 'Address.ID = 0 <Name not available>'
57:49.453 Terminal.ID := 0
Terminal.Count = 0
Terminal.Name = ''

 

[Akebono]

I now see the previous build only supported outbound TAPI. As the msi file name of the newest and the older builds are the same, there was some confusion.

Installing newest build (727)...