Input area unresponsive

First off, apologies if a similar question has already been submitted/answered - i took a brief look through the first few pages and didn't see anything that seemed to match, but i could have missed it. I also looked through the docs and the code to see if there was an obvious solution to no avail.

I have been attempting to install the latest version of fckeditor (2.6.3), and everything seems to be set up, with one large problem: the text area seems to appear (there is a white box), but is unresponsive - no cursor, and no text appears when typing. I also notice that it does not have the border that it does in the demo and where i have seen it elsewhere - just a white background.

Firefox gives me no indication of a problem. IE, however, says there was a 200 server error when loading fckeditor/fckstyles.xml - specifically a syntax error (unexpected T_STRING on line 1). I have not touched that file, nor do i see any obvious problems with it (for what that's worth).

I suspect this to be some kind of error caused by some configuration on my server, but i'm not sure what. I *do* have xml files set to be parsed as php (for setting up rss feeds elsewhere), but i don't know why that would cause a problem - and unsetting that parameter doesn't seem to help. I don't see anything in php.ini that would be suspect either.

Thoughts?

~PS