Warning: main(/home3/simplie/public_html/xx/skins//_main.php): failed to open stream: No such file or directory in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Make sure there isnt a trailing slash at the end of your baseurl in _config.php and reload your skins folder. It looks like there's a file missing.

$baseurl = 'http://simplie-me.net/xx'; // IMPORTANT: NO ENDING SLASH !!!

I found it like that on my _config.php

By "reload" do you mean replace the "skins" folder with a new one? Liek download the b2evolution file, and replace the skin folder?

edit;;
i downloaded the b2evo folder, and took the b2evocore folder and the skins folder and used them to replace the old ones. but i still got this message when viewing Blog #2(Blog A)

Warning: main(/home3/simplie/public_html/xx/skins//_main.php): failed to open stream: No such file or directory in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Warning: main(/home3/simplie/public_html/xx/skins//_main.php): failed to open stream: No such file or directory in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Fatal error: main(): Failed opening required '/home3/simplie/public_html/xx/skins//_main.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Did you double check the skin that the blog is set to use? It looks to me like the blog is trying to use either a skin with no name or a skin that does not exist. Try changing it to another skin and then changing it back.

how do you change the default skin? :)

Log in to the Administration section, go to the Blogs tab, choose the particular blog you are using. About halfway down the list of options is the default skin.

I did that but it didn't help, I got the same message for it.

Warning: main(/home3/simplie/public_html/xx/skins//_main.php): failed to open stream: No such file or directory in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Warning: main(/home3/simplie/public_html/xx/skins//_main.php): failed to open stream: No such file or directory in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Fatal error: main(): Failed opening required '/home3/simplie/public_html/xx/skins//_main.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home3/simplie/public_html/xx/b2evocore/_blog_main.php on line 266

Would the skin names you are using happen to have a space in them? If so, can you try switching to a skin that doesn't have a space in the name?

http://simplie-me.net/xx/index.php?blog=2&skin=custom

If that doesn't work, then try deleting the cookies in your browser, in particular one called "cookieb2evostate", and try http://simplie-me.net/xx/index.php?blog=2&skin=custom again.

Okay thanks! that worked!
thank you,
jojo