Error in SmartClient for Smart GWT 4.1p

I am getting the following error:
This build of Smart GWT 4.1p was built for SmartClient version v9.1p_2014-06-30 but SmartClient version SC_SNAPSHOT-2011-12-05 is loaded.
To correct this problem, clear GWT's unitcache, run a GWT compile, restart the browser, and clear the browser's cache before visiting any pages.

Followed the instructions but still not resolving.

I am upgrading Smart GWT from Smartgwt 3.0 to SmartGWT 4.1p