you need to put rpc-endpoint = 127.0.0.1:8090 in the config.ini file
I think the wallet connects to the steemd service to connect to the blockchain and it needs this ip address to do it.
maybe this is technically wrong but i think it will fix your issue :)
ok cool ill have a go
let me know how it goes, I'm quite new but am trying to get this working too... :)