Sonar only detects 1 input on my PreSonus AudioBox iOne (there are 2)!

I have a PreSonus AudioBox iOne interface that has two inputs and one stereo out / 2 x mono out.
Sonar only detects 1 input from this device all though it has two inputs, one for mic and one for guitar / instrument.
This makes Sonar pretty much useless for me.
Other audio programs I use detects the inputs correctly, as two separate inputs.
Please help me out with this.
 

Nope. It just says AudioBox ASIO Driver (1 in, 1 out)
 

No, you see, that's the problem. it only picks up the 1L not 1R, so in practice I have only one input one output (mono)
 

So there is no submenu under "AudioBox 1in, 1out"

the devise is also a few years old and only given Sonar 8.5 as a supported DAW in its manual.
heres the instructions from the manual.
 
Cakewalk Sonar 8.5+
1. Launch Sonar.
2. Go to Options | Audio... and click on the Advanced tab.
3. Change the Driver Mode to “ASIO.” (Using WDM, rather than ASIO, for pro-audio applications is not recommended.)
4. Click the “OK” button.
5. Restart Sonar.
6. Go to Options | Audio... and click on the Drivers tab.
7. Depending on which interface you have, highlight all input and output drivers for “PreSonus AudioBox iOne” or “PreSonus AudioBox iTwo.”
8. Go to Options | Audio... and click on the General tab.
9. Based on the interface you have, set the Playback Timing Master to “PreSonus AudioBox ... DAW Out 1.”
10. Based on the interface you have, set the Recording Timing Master to “PreSonus AudioBox ... Mic/Inst 1.”
11. You’re now ready to use your AudioBox interface.