Cannot add another subsite link to global navigation in sharepoint 2010? - sharepoint-2010

Cannot add another subsite link to global navigation in sharepoint 2010, somehow is locked, any ideas?

Are you Global Admin, is it Team Site?

It has to be a team site template:)

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When export/import a site in sharepoint 2010 (WSS), error occur "A Web Part with this ID has already been added to this page"

I have a webpart, and I insert that webpart into a site of Sharepoint 2010 (WSS).
I save a site as template by that site. After, I create a new site with that site template. I export this site, and after I import it. I see a error in import site:
"A Web Part with this ID has already been added to this page".
Please help me to fix it.
(It work well on MOSS 2010)
Is new site is on the same farm as the originating site?, I would also asume that this is a Team site with Publishing features or a publishing site al togethere right?, if so, basically is having a conflict of GUIDS for a particular web part within a page or layout. If you see most of the site comming up, then is easier, because you could open the page or layout using SPDesigner and change the guids of the added webparts on the page; if not, you might need to crack open the template file and do it there.
Changing the GUIDS might help you to bring the page up, however any change done of the front-end could reverse the changes, so the best option is to edit the page and re-add the web parts, so it takes a new GUID for good.

sharepoint 2010 page with page layout asking for user credentials

i have a sharepoint 2010 site which has anonymous access, the pages without layouts has no issues.
the pages which are using page layouts are prompting for user credentials.
Please advise me.
Thanks in advance.
Please make sure your layouts are checked-in and published along with its all referred css and script files. Also, the layout should not contain any webpart or control which require elevated permissions.
Are you sure that the page layouts does not have any permissions on them? Or: are you sure that the page layouts have anonymous permissions?

SharePoint 2010: Which publishing feature adds the "Navigation" site settings link?

When publishing is activated on a web, a new "Navigation" link is displayed on the site settings page (which points to _layouts/AreaNavigationSettings.aspx).
I want to change the permission levels which dictate whether this link is visible on the page, however I can't find the CustomAction which installs this link.
Does anyone know which XML file in which feature this is defined in?
It is obvious that this is an out of the box feature, so you can't modify it without invalidating your support :/
What you could do is build your own feature and use a feature with CustomActions to remove and replace the links to the current page with links to the new page you're creating.

Deploying custom webpart to sharepoint 2010

In sharepoint 2007 for to deploy a custom webpart i have added all of its application references as a safe control, so i got my webpart correctly. But now i using the sharepoint 2010 and need to deploy a custom webpart in it, hence i followed steps such as
1.Created a webpart(Deploy as a farm solution) using VS2010 of type sharepoint->2010.
2.Used the Sharepoint 2010 Management shell to add the webpart to the sharepoint site.
3.Then using the sharepoint Central Administrator v4->System Settings->Manage Farm Solution->Mycustomwebpart
4.Clicking on that webpart and select deploy option, and hence it is been deployed to the site.
Then in sharepoint home site ->Site Actions-> Site Settings->Site collection Features-> select Mycustomwebpart and click on the Activate button.
6.Now, for to show the webpart, i gone to a site ->site Action-> Edit Page ,then click on Add a webpart then select the custom option and select Mycustomwebpart and click on the Add button.
7.Now i getting the error as "File Not Found" with error message as Web Parts Maintenance Page: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator.
8.Please guide me to overcome this error.
Lots of thanks in advance..........

Missing site templates when creating a publising (template) site in SP2010

All I am having issues trying to add some of the additional site templates when a user selects New Site form the site settings menu. I have a publishing site template as recomended by Microsoft as a default Intranet site. How can I add some of the templates such as a team site, or something else?
I was using a publishing template from the start, so i rebuilt the server anyway, and created a blank site with activitating the publishing features.