php/apache image browser/upload - wont work!

I uploaded all the files to public_html/FCKeditor and tried to access the samples. The javascript based samples work fine while the php samples give a 404 error in the iframe with the editor. I checked the code of sample01.php and noticed that its trying to get the path string from PATH_INFO session variable which is returned empty for some reason. I manually added the correct path and it now works but Image browsing and uploading doesn't. I've created the /userfiles folder in public_html but that didn't help either. Image browser shows nothing and when I upload a file the upload button is grayed out and stays like that.. I tried this with RC1 and RC2. I am sure this is a configuration problem but I can't see what else I should do.