Thread:Extension talk:SemanticComments/Error in MW 1.23, SMW 2.0

Hi, I just upgraded from MW 1.20, SMW 1.8.0.5 to MW 1.23 and SMW 2.0. I downloades SC for MW 1.23 and recieve the following error: Fatal error: Call to undefined function wfLoadExtensionMessages in .../extensions/SemanticComments/includes/CE_GlobalFunctions.php on line 87