[TYPO3-english] Uncaught TYPO3 Exception: Class t3lib_FlashMessage does not exist error when install "tw_rssfeeds" extension

[PIT Solutions]

Hi All,

I am trying to implement an extension "tw_rssfeeds" for external rss news feeds. But I got an error message "Uncaught TYPO3 Exception: Class t3lib_FlashMessage does not exist" in front end.
I am using typo3 version 4.5.17 and "tw_rssfeeds" version 2.1.4.

Please help me.

Thanks in advance,
    Arun Chandran.