recently bought a 2007 sti

[e1.8t]

so i recently bought a 2007 sti and downloaded the g4x software from links web site and im pretty sure the WRX107X ecu is installed but how do i make the car commutate with my compute? i plug in the usb and load the software up but the computer dose recognize the ecu 

[Adamw]

Probably more likely a G4 or G4+ as the G4X has only been on the market for probably less than a year or so.  

So you can either try the G4+ software and see if that connects or gives you some useful error message - or you can slide the ecu out of the case and see what it says on the ECU.  Or if you give us the serial number we can confirm that way.