SharePoint CreatePage.aspx page not redirect when new page created in pages library

Hi,

    I am facing a problem while adding new page to pages library in production. when I create a new page from CreatePage.aspx page in library, it did not redirect to newly created page but still show create.aspx page. Although new page is added to library. I found following errors in ULS log viewer. 

1. UserAgent not available,file operations may not be optimized.at Microsoft.SharePoint.SPFileStreamManager.CreateCobaltStreamContainer SPFileStreamStorespfs, ILockBytes ilb, Boolean copyOnFirstWrite, Boolean disposeIlb)
2. UserAgent not available, file operations may not be optimized.
   At Microsoft.SharePoint.SPFileStreamManager.get_UserAgent()
   at Microsoft.SharePoint.SPFileStreamManager.CreateOutputLockBytes(Int64 cbContentHint)
3. No zip central directory found
4. Failed to get document content data. System.ComponentModel.Win32Exception (0x80004005): Cannot complete this function
5. Failure when fetching document. 0x80070012.

Please give me direction to solve it.  Thanks in advance.