List does not exist. The page you selected contains a list that does not exist. It may have been deleted by another user.0x81020026

I have migrated a sharepoint site from a 2007 server to 2010 server..

After Migration we need to update the Relationships List as described in the below URL..

http://code-journey.com/2011/one-or-more-field-types-are-not-installed-properly-after-upgrade-from-sharepoint-2007-to-2010/

Following are the steps..

1:  Go to the site collection feature administration under Site Settings.

2:  Deactivate the SharePoint Server Publishing Infrastructure feature

3:  Delete the Relationships list 

4: Reactivate the feature. Now the name field name should be correct.

I was able to perform the 1st three steps.. I am not able to reactivate the feature.. It gives me object reference error. .

And When i now open the page, it says,

List does not exist. The page you selected contains a list that does not exist.  It may have been deleted by another user.<nativehr>0x81020026</nativehr><nativestack></nativestack

Any Ideas would be greatly appreciated...