I had Docs2Go connecting well with my iPad and PC. Then, I had to re-install my Docs2Go after I restored my iPad. When I went to my Docs2Go to answer your question, I find that my Docs2Go is no longer hooked up with my PC. All this to tell you, here is what I did to re-establish a PC-iPad connection. Some steps may be different, some may be the same - but hopefully some will contain the answer you need...
In Docs2Go (henceforth shortened to d2g for ease of typing), at the bottom of the screen, select "Desktop." Fill in the information needed to get the download link for the PC installer.
They're quick and you get an e-mail right away for you to download the desktop application [but I don't think you have to register to get the download ... I did anyway]. Download the appropriate desktop app for your computer and install it. What I did was have d2g desktop application open when you finish installing it.
Meanwhile, on your iPad, once you've completed the registration process (or pressed later if you didn't want to), a screen will appear with a 4-digit passcode. Now it's time to pair the two.
Have d2g open on the PC. In the upper RH is a button "Options." Select "Add Device" and follow the instructions. I'm old, so I don't remember all I [just] did, but at the end (after I followed the wizard's instructions), I've got successful pairing of the iPad and the PC (the iPad even gives you a pop-up saying they are connected). Now, on the iPad, you should see a line "My DocsToGo." Press on it and that's where the documents will be that are synced with your PC.
On my PC, the d2g is established as a file folder under My Documents. As long as the desktop application is running, you can sync with the iPad app. BTW, there's a sync button (swirly arrows) at the bottom left of the d2g app on the iPad...
Now, all done! You can use the desktop app to browse around your iPad's d2g. You can browse, edit, copy, delete, etc., files.
I hope that some of that was helpful (it was helpful to me - I just re-sync'd with my PC, that I forgot wasn't sync'd!). If I've gone way off base, or if you need more help, give us a shout.
Good luck.
Marilyn