im having problems loading this free plugin from AW
i goto the plugin manager and browse for the mental ray plugin select it and when i load it i get this error message

loadPluginCallback "C:/Program Files/AliasWavefront/mental ray for Maya 1.5/plug-ins/Mayatomr.mll" "plug-in";
// mental ray for Maya 1.5
// Error: Cannot find procedure "mentalrayForMaya_v15". //
// Error: (Mayatomr) : setup command execution failed //
// Error: initializePlugin function failed (Mayatomr) //
// Result: 1 //



any ideas? im using maya 4.5 and it is the most recent version of mental ray 1.5