Forgot to mention, put this line in vplug.ini:
ECM_Filter_Timeout_Sec = 86500
and re-start vPlug daily!
Because SBCL does not send EMMs to vPlug, you will need to add keys manually to vPlug. I suggest you clear out all keys then add SV keys (Name=I, Provider=00, plus latest Key Index/Key). Keys change about every half an hour, so make sure they are bang up to date.
If that fails, post SBCL log.