I'm not sure what is going wrong either.
What firmware is used in your Vera?
It sounds like you are unable to put Vera in inclusion mode from the MySensors Plugin device.
But there is also some communication issue since there are 2 messages failing to be sent:
0;255;3;0;9;!TSP:MSG:SEND 0-0-4-4 s=255,c=3,t=25,pt=1,l=1,sg=0,ft=0,st=fail:1
I_PONG 25 In return to ping, sent back to sender, payload incremental hop counter
0;255;3;0;9;!TSP:MSG:SEND 0-0-4-4 s=255,c=3,t=27,pt=1,l=1,sg=0,ft=0,st=fail:1
I_REGISTRATION_RESPONSE 27 Register response from GW