If the track meters are moving, the problem isn't with the audio or MIDI, but with where that track is routed. If the project doesn't include a master bus, add one and select it as the destination in each track's Output dropdown listbox. When you create the master it should automatically be sent to your audio interface, but check it to make sure.

Possibly I can help as I have my Acer Laptop sitting here running on board and using ASIO4all. 
There are dozens of way to do what I'll decribe but I'll choose this one below for now. 
 
Open Preferences /Audio
Open the Devices and make sure "ASIO4ALL bla bla soundcard"  is checked for the in/output. 
Open Driver Settings and make sure ASIO4all is the timing master
Open Playback and recording and select ASIO 
 Don't forget to select APPLY
 
Now open a project and if there isn't one Insert a MASTER buss by right clicking in the Buss pane which is below the track pane. Use the insert stereo buss and then Name it MASTER 
Assign the MASTER buss output to ASIO4All - speaker/headphone ( or what ever your system calls it) 
Insert the TTS_1 if there are any MIDI tracks ( for now to test) 
 
 
Now select all your Tracks using Ctrl A 
above the time line find "TRACKS"
At the bottom of the dropdown is " Selected track output"
Under the audio outputs select MASTER  this sends all audio tracks to the master. This also will send the TTS_1 audio output to the Master. 
Under MIDI output select   TTS_1  this sends all MIDI to the TTS_1 
 
Your tracks be they midi or Audio will now play.  
 
 

Imho the soundcard Settings are irrelevant here. the old wrk files have per Default no soft synth assigned. So the the Output is routed to the first available midi device. As Long as this is only one port where a valid wavetable synth is listening, it might work. 
In any other case it will probably not without routing the midi Output correct.
 
Which midi-output device has been set ?
 
You find it under preferences/midi/devices/outputs
 
for Debugging purpose i recommend to check the Microsoft GS Wavetable Synth as ONLY Output device. After this try it out again.
 
Another option is, to export the wrk as mid and load this file (not sure if this works with the demo). Then in midi uncheck all Output devices. this Forces to load the tts soft synth, which works fine with mid but does NOT with wrk.
 
Much luck!
 

The  TTS-1 will only automatically load if you set Preference/ MIDI /Device to "none" in other words uncheck all boxes. 
 

Cactus Music
The  TTS-1 will only automatically load if you set Preference/ MIDI /Device to "none" in other words uncheck all boxes. 

 
Thats what I wrote here:
 

SigiZ58
Then in midi uncheck all Output devices. This forces to load the tts soft synth, which works fine with mid but does NOT with wrk.

 

 
The TTS is NOT load with *.wrk files, even if you uncheck all midi devices.
 
Sorry, my english might be not the best....