If your issue really is a popup blocker, try another browser like Opera (which allows the popup blocker to be turned off in settings). IE does not allow popup blocking to be specifically enabled or disabled
AFAIK.
Also keep in mind that a whole lot of sites just don't work on mobile browsers. You might not be encountering a popup blocker at all - maybe just a site that doesn't place nice with Mobile Internet explorer, which is operating on
very old technology at this point.