I'm not saying it will make a difference, but IPTV PVR Stalker is different from PVR Stalker client. IPTV PVR Stalker doesn't do the authenticating. That is accomplished by IPTV Stalker Plus whereas PVR Stalker client does its own authenticating. Do make sure PVR Stalker client is not enabled at the same time as IPTV Stalker Plus because that will cause an issue.
giving it a go....will keep you notified as to what happens