Sharepoint 2010 crawl stopped unexpectedly

Hi all,

I need help regarding SP 2010 Content Crawl. It has stopped unexpectedly on Feb 24th (I verified this from the SQL CrawlContentDatabse). I'm unable to access to the Content Sources and Crawl Log pages from Central Admin as it throws Access Denied exception. I have tried with all Service accounts configured for the farm and for the Search service but same result. None of the account passwords have changed. I'm able to search for the content that is already crawled but unable to search for anything that was added after this date.

Please let me know where to look for to resolve this issue.

Regards, Kapil ***Please mark answer as Helpful or Answered after consideration***