As you can see, you'll get an Invalid argument message, which will then continue to display when you try to stream music using Flash, Silverlight or Windows Media Player until you adjust your settings in either Internet Explorer, Safari or Firefox. Now, the key here is not to panic. I know website errors make my body temperature rise and my palms start sweating, but I promise there is no need for such a reaction anymore!
The key is to clear cookies. Yes - this will stress some of you out even more than the error message, but in order to get the NML to work after you receive that error message, you must delete cookies! (Picture courtesy of Scott Beale / Laughing Squid)
According to Ask Leo, cookies are simply a way for websites to remember who you are the next time you visit. He sites Amazon.com as a great example:
When you visit a site like Amazon.com and log in, Amazon might place a cookie on your machine that contains your account name, and the fact that you're logged in. When you come back a day later Amazon.com picks up the cookie and sees who you are and that you had successfully logged in the day before.
So if you rely on cookies to remember who you are for websites, make sure you have a record before you delete cookies! The best way I've found is to keep either a log on a table in Word, Excel, or just keep a running list at your desk. As always, if you have any questions, be sure and ask!