Make sure you have not accidentally used the script tag helper with a css file. The error is a JS error and is typically thrown when something that is not JS is run in a script tag.

I have done this myself when copy/pasting HTML::style and HTML::script calls. Getting the fail line from the browser console can help in finding the offending line. At least get you in the right ballpark.

First of all, thanks!

No, I used the correct file. And I have the problem again, but now, it is near to the deadline.

Sometimes it worked for me to put a ?versionasdasdasd or something like that to the end of the URL but it does not work now. I don't know why.

Update: yeah the error I wrote was only JS, because CSS does not usually tell me the problems. :)