Ensure that 
                  		  Allow Dynamic Debugging is selected. If it is not already selected, select the option and restart the server. 
                  		  
                  Tip: An alternative to checking this option is to set the 
                     			 Automatically enable dynamic debugging option, available from 
                     			 , to 
                     			 Always; this ensures that if dynamic debugging is not enabled in the enterprise server when you start debugging, the IDE enables
                     it automatically when you enter debug mode.