fopen remote file problem..

I have been trying to fopen many files from many different web servers, but am having a problem doing so about 2% of the time. I understand how fopen works (mostly) and can open remote files. I even understand that many times you need the following "/" on a web page to open it. However, there is that 2% of the time I wind up getting the error 'Warning: fopen("http://file.to.open","r") - No error in myfile.php on line 1', even though I know that specific file exists. For instance, one strange place I have found when playing around with this is at BestBuy.Com. If I try to open any of their product detail pages I get this error! http://www.bestbuy.com/detail.asp?e=11000491&m=82&cat=86&scat=88 - Warning Error Comes Up http://www.bestbuy.com/detail.asp?e=11070538&m=1596&cat=1600&scat=1602 - Warning Error Comes Up Yet, on most other parts of their site I am able to open files.. http://www.bestbuy.com/default.asp - No Problem http://www.bestbuy.com/PhotoImaging/Cameras/index.asp?m=82&cat=86 - No Problem http://www.bestbuy.com/siteIndex.asp?b=0 - No Problem http://www.bestbuy.com/splash.asp?url=http://www.bestbuy.sundial.com&keyid=C ellular - No Problem How come this error happens on only those detail.asp pages? From what I can tell, detail.asp is not a redirect page. ?? Thanks for any help. I know there has to be an answer to this problem, sadly I can not find it myself. Andrew