Galaxy Tab 10.1 doesn't keep wifi connected despite settings

My **Galaxy Tab 10.1**, 16GB Wifi only version, **disconnects the WiFi whenever the tablet goes into sleep mode**. I have ensured that I have selected to never sleep in advanced WiFi settings. I downloaded and experimented with the Wifi Keep Alive and REGPON wifi KeepAlive apps, but they have had no effect. I even tried rooting the device, and put on this ROM , in hopes that maybe some change would take effect, but it hasn't. Is this a known issue with the Galaxy Tab 10.1? I've done some Google searching and I've seen other people report it, but most fixes seem to just describe how to go into the advanced settings and enable "never" as an option. Is there any kind of fix I can apply? This is a somewhat critical feature for me, as I intend to be able to receive Skype calls, which can't be done if the WiFi disconnects.