Unable to fetch feed

Trying to get a Commission Junction feed into my website, so I followed the instructions in order to do so, but got this error when I clicked fetch-feed:

Warning: 1 MagpieRSS: Failed to parse RSS file. (Cannot open ) in /home/****/public_html/administrator/components/com_datafeeds/cron/rss_fetch.inc on line 242
no Items ? :

Any help would be great!

Thanks

there are quite a few steps in the proces so i need more details to work this out.

can you manually download the feeds?

Yes I was able to download the feed when I placed it on my website. I also checked the CJ username and password are correct by manually running the cj feed url in my browser.

Any ideas?

did the example feed installed with the component work?

could you provide the feed as a download somewher?

Yes example products were ok on website. But when I try to fetch a CJ feed I get this error

Warning: 1 MagpieRSS: Failed to parse RSS file. (Cannot open ) in /home/user/public_html/administrator/components/com_datafeeds/cron/rss_fetch.inc on line 242