Sitemap Generator Forum

I have been trying unsuccessfully to generate site maps for multiple domains ([ External links are visible to forum administrators only ], [ External links are visible to forum administrators only ], [ External links are visible to forum administrators only ], [ External links are visible to forum administrators only ] and [ External links are visible to forum administrators only ]) that are hosted with one provider ([ External links are visible to forum administrators only ]). However my other domain ([ External links are visible to forum administrators only ])  which is hosted with a different provider ([ External links are visible to forum administrators only ]) was able to generate a sitemap no problem.

The error message  that I get is:

An error occured

There was an error while accessing the URL specified: [ External links are visible to forum administrators only ]
Please make sure to specify the correct website URL and resubmit your request.

I am guessing that their might be a security setting with the one hosting provider that needs changing however without more information in the error message it is difficult to determine.

Any ideas? 

Thanks in advance.

Looks like there is a problem with network connection between our site and your host. It might be resolved on its own after a while though.