Make sure you don't have any programs running that block pop-ups. Having one or more of these running will block pop-up windows from opening. Not all pop-ups are bad.
Pop-up blockers or "script blockers" can be a browser plug-in, an 'extra feature' in a firewall or stand-alone program. For example, the latest version of Yahoo Instant Messenger has a hidden pop-up blocker. Turning it off should fix the problem if all else fails.
If you find a blocker running, check to see if it has the ability to allow pop-ups from a specified website. If such an option does not exist, you'll need to disable your pop-up blocker. Doing so will allow the new window to appear and perform the function you want.
If you already turned off all your pop-up blockers and you're still experiencing the same issue, check to make sure you don't have any hidden toolbars running as well.
Be aware that some toolbars can still be running while they're hidden. To see all your toolbars, right click anywhere in the grey area near the top of your browser window, it should show you a menu of any toolbars you have installed with checkmarks next to them. If you see anything else in that menu that looks like it could be a toolbar, but does not have a checkmark next to it, that would mean that it's still installed but hidden. Usually you can click on it in that menu to make it visible, and most toolbars will have an uninstall option on them.
IMPORTANT:
Please understand we cannot give tech support for third party software with pop-up blockers. If you need further assistance, we strongly recommend you contact the manufacturer of such programs.