PDO Exception while enabling block class module

I am getting the following error when trying to enable the block class module.

PDOException: SQLSTATE[42S02]: [Microsoft][SQL Server Native Client 11.0][SQL Server]Invalid object name 'block_class'.: SELECT css_class, module, delta FROM {block_class}; Array ( ) in block_class_preprocess_block() (line 18 of C:\Users\bond\Documents\My Web Sites\Drupal Commerce Kickstart\sites\all\modules\block_class\block_class.module).

Am using Drupal 7.15 (from drupal commerce package). Development using Microsft webmatrix and SQL server database. Please help.