I am facing a very crucial problem with our MOSS 2007 Server, please
help me to resolve it.
I was Inplace upgrade our Share Point Portal Server 2003 to MOSS 2007
before one year,

Last week I was deleting a page on site collection root site but
accidentally I delete this root (http://mymoss/default.aspx), site
collection. After deleting I observed that main page is not there, even
I check it in recycle bin.

So I crate a new site collection from Central Administration +
Application Management + Share Point Site Management + Create Site
Collection associated with root (/) path.

After create new site collection on root (/) our main page is displaying
as (http://mymoss/sites/default.axpx" target="_blank" rel="nofollow">http://mymoss/sites/default.axpx) as it was before
http://mymoss/default.asxp) SITES path automatically added with newly
created site collection.

The problem I am facing is that
Following below mentioned error message is displaying as I click "Site
Actions" + Edit Page in http://mymoss/sites/default.axp main page.

=>

Go back to site

Error

The type is not registered as safe.

Web Pars 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.

Troubleshoot Issues with Windows Share Point Services.

<=

Please let me solution ... urgent please...

Awaiting your earliest response.