WHy am i getting this error~~

Error C:\Documents and Settings\HP_Owner\Local Settings\Application Data\Macromedia\Flash MX 2004\en\Configuration\Classes\mx ransitions\BroadcasterMX.as: Line 2: The name of this class, ‘mx.transitions.BroadcasterMX’, conflicts with the name of another class that was loaded, ‘mx.transitions.BroadcasterMX’.
class mx.transitions.BroadcasterMX {

Error C:\Documents and Settings\HP_Owner\Local Settings\Application Data\Macromedia\Flash MX 2004\en\Configuration\Classes\mx ransitions\OnEnterFrameBeacon.as: Line 4: The name of this class, ‘mx.transitions.OnEnterFrameBeacon’, conflicts with the name of another class that was loaded, ‘mx.transitions.OnEnterFrameBeacon’.
class mx.transitions.OnEnterFrameBeacon {

Error C:\Documents and Settings\HP_Owner\Local Settings\Application Data\Macromedia\Flash MX 2004\en\Configuration\Classes\mx ransitions\Tween.as: Line 5: The name of this class, ‘mx.transitions.Tween’, conflicts with the name of another class that was loaded, ‘mx.transitions.Tween’.
class mx.transitions.Tween {

Error C:\Documents and Settings\HP_Owner\Local Settings\Application Data\Macromedia\Flash MX 2004\en\Configuration\Classes\mx ransitions\easing\Elastic.as: Line 1: The name of this class, ‘mx.transitions.easing.Elastic’, conflicts with the name of another class that was loaded, ‘mx.transitions.easing.Elastic’.
class mx.transitions.easing.Elastic {

Error C:\Documents and Settings\HP_Owner\Local Settings\Application Data\Macromedia\Flash MX 2004\en\Configuration\Classes\mx ransitions\easing\Bounce.as: Line 1: The name of this class, ‘mx.transitions.easing.Bounce’, conflicts with the name of another class that was loaded, ‘mx.transitions.easing.Bounce’.
class mx.transitions.easing.Bounce {

Total ActionScript Errors: 5 Reported Errors: 5

im trying to use classes and its not letting me, anyone had this issue and knwo how to fix it?