Strange problem with links to pdf:s

Hi,
I am having something strange happening to the site I am currently updating.

The site contains a number of links to pdf:s. THe links are done with the following simple code:[AS]marketing.onRelease = function() {
getURL(“pdf/text_credits.pdf”, “_blank”);
};[/AS]I have now updated the page and between other things added more links and encountered a strange problem. On some PC:s the link won’t work.
The browser (always Explorer of course…) gives a message saying that the action was interrupted. Acrobat Reader doesn’t open. HOwever if I send the pdf:s by mail they open without problem.

On Macs (OS X4.4, Safari, Explorer, Firefox, Netscape) it’s no problem, they will open but the activity window in Safari will say that a plug-in is missing.

On some PCs it works fine too and I have still not been able to figure out what differs these PCs. It’s not the operative system anyway.

I have recoded the links in the movie both in expert and easy mode and also changed the links from local to global (http://etc) with no difference.

I have also made a simple html-page with links to the same pdf:s to make sure I could access them through an html-page and it works.

I haven’t made the pdf:s myself since I don’t have the program. Someone made them for me (on a Mac) and I published them. The first pdf:s were made by me through the printer-function from a WORD-doc but on an earlier Mac OS version(10.2.8). We thought at the beginning that that was the problem but apparently not.

The movie is published as Flashplayer 6, I am on Mac OSX 4.4.

Does anybody know what could be wrong?