Ahh yeah I'm having a similar issue.  I'm running the only existing GPU miner on a system with updated drivers to work with CUDA 9.2 and it seems to be running and so forth.  I'm seeing payouts stack up on the mining pool I'm using.

however....I can't get the windows wallet client to connect to anything.  There are others mining and there's a nethash, so obviously it is working but.  I don't know what I'm doing wrong.  It's not working 'out of the box' so to speak.

I hope this project goes well and things pick up.  I hope it's contributes and establishes healthy competition as an ASIC resistant coin and such but, this is a really rough launch.

It's stating 'no source block available'.  It's not connecting and accessing the blockchain.  I don't know why though.

Update:  I went to the debug window.  In the Information tab.  The connection area (Name: main) I assume is implying connections to the mainnet as opposed to a testnet.  Number of conncetions keeps flashing from 0 (in 0/ out 0) to 1 really quick and then back to all 0.  It's like iet's trying to connect but can't.