Sharepoint Designer 2010 Workflows Struck in "starting" status after Sharepoint 2010 SP2 upgrade(KB2687453 - April 2013)

We have SPD workflows and Nintex workflows which are configured to start automatically on a Document Library which have content type. After we have been installed KB2687453 (sp2) , all the workfows running on documnet library with content type got strucked and always saying" starting".  Please help us.,... highly apprciated as it's urgnet. Thanks in advance.