A quick update for anyone who experiences a similar situation. The power light on the SmartCom no longer needs to be on to indicate that power is being received. I'm now able to login to Wintex remotely via the SmartCom. I didn't realise that my Wintex account details were held locally and it seems that the fact that I was using a different PC to login was the issue, after setting up a new Wintex login and dowloading the information from the panel, all seems to be fine.