Can't connect over 3g/4g

I can connect to my CPU over wifi, but can not do it over 3g/4g.

I am sitting in front of my desktop. It is not in hibernate or sleep mode. Pocketcloud companion is installed. Discovered connections on my mobile device is 'on'.

1) Pocketcloud mobile version: 1.2.165
2) Device: HTC Thunderbolt (Verizon)
3) OS: XP Pro
4) Error message - Network currently not reachable. Service disconnected
5) Pocketcloud companion version: 2.2.15