A problem with vBSEO Google/Yahoo Sitemap Generator drives me crazy

[Super Jinni]

Hi all,

I hope some one can help me with this

I've installed vBSEO Google/Yahoo Sitemap Generator v.2.1 in my vbulletin

and I did everything as mentioned in the Installation Instructions

and everything went but

when I go to add my sitemap in google webmaster tools it gives me this error:

General HTTP error: 404 not found
We encountered an error while trying to access your Sitemap. Please ensure your Sitemap follows our guidelines and can be accessed at the location you provided and then resubmit.


I don't know what's wrong and I hope someone can tell me how to get over this issue

I've installed this in another website and everything went ok and I hadn't any problem with it and it works just great and a few days later I installed it to my other website but I have this problem...

why do I have this problem with my new website and I didn't have it in my first one?

any idea about how I can fix this, please? because this problem is reall driving my crazy


thank you