Database Table Creation Error

when activating multiforms in the modules page it creates a series of tables called multiform_xxx (where xxx is the sub name) however the it does not add the prefix that may have been set. My prefix is prod_gfp_ so the table name in this instance should read as prod_gfp_multiform_xxx. I have tried changing the table names to reflect the prod_gfp_ however some of the module accepts this and other parts look for the table name without the prefix.