I am experimenting with what I thought would be a simple PHP script utilizing AJAX. For a while, everything worked like they should.

Then, all of a sudden, I get this Javascript error:
"Could not complete the operation due to error c00ce514"

Googling this error gave me no intelligent answer. I also know that the problem isn't in the source code. Please help me out.

It would help if you pasted the code.

Is it the same error on all browsers or is that message browser specific?

I currently only see it in IE7, not in Firefox. How come AJAX won't work properly in IE7?

I currently only see it in IE7, not in Firefox. How come AJAX won't work properly in IE7?
I'd be happy to guess at that, but we need not start YAIEVFFD . :)

Well Googling the error code points to msxml3.dll - the Microsoft XML Parser. So at a guess, either you're feeding it invalid xml or it's choking on your valid xml - both are possible ;)

Post the code... I use Ajax all the time on IE 7 with no problems.