For some reason after hooking up Linksys router I'm unable to open several sites/pages that had opened with no problem when using my PPPoE software. At first, maybe only 10% of commonly-used sites wouldn't open. But as time goes by, more and more pages won't open. Switching back to PPPoE software only verifies that those pages can indeed be opened--but not with Linksys. Installing lastest firmware didn't help. Any suggestions?