1st - Upgrade your ROM.. gROM is unsupported and dead I think...
Check to see if there are any errors in the app.. Push the menu key and find the log.. or status.. Make sure nothing there says "FAILED".
Next, check to be sure YOU have an Internet connection... #*#*4636*#*# in dialer.. Phone Information > RUN PING TEST. Make sure all three things there say Pass.
If they say failed there, you might not have a Internet connection. Go to browser and load up Google to be sure..
If you don't have an Internet connection, try rebooting and toggling airplane mode/mobile data to get one.. Check your APNs by going to Voice Dialer and saying "Open APNs"..
That should fix you!
Please hit the Thanks button if it helped.