Go-ethereum: Start mining is grayed out

[Intoit82]

System information

Geth version: 1.6.6
OS & Version: Windows 7

Ethereum wallet version 0.9.0

Hi,
I have a competently synced wallet working on Rinkeby test network.

For some reason I am unable to mine using the wallet UI nor the geth command line.

Using geth I am getting the following error:
"Block sealing failed err=unauthorized"

My coinbase account is unlocked...
I've used the following command: personal.unlockAccount(eth.coinbase,"xxxx",0);
(with 0 parameter - so timing is not an issue)

Another strange thing is that I am not seeing the red UI box on the top which should state "TEST-NET"

By running clique I am getting:

clique.getSnapshot()
{
hash: "0x2a7c1112084a10353dcdffd33e9cde3c9a456dcdaa532a90e94bf75d7e1255a5",
number: 766112,
recents: {
766111: "0x7ffc57839b00206d1ad20c69a1981b489f772031",
766112: "0xb279182d99e65703f0076e4812653aab85fca0f0"
},
signers: {
0x42eb768f2244c8811c63729a21a3569731535f06: {},
0x7ffc57839b00206d1ad20c69a1981b489f772031: {},
0xb279182d99e65703f0076e4812653aab85fca0f0: {}
},
tally: {},
votes: []
}

I've also tried to remove the blockchain and reSynced it.

Please help

[karalabe]

Rinkeby is running a Proof-of-Authority consensus engine. Only authorized signers are allowed to mint new blocks. If you need ether for testing, please request from the faucet https://faucet.rinkeby.io/.

As for the UI, please open an issue on the Mist repository.