Trouble with UPDATE PER SET PERBloque6='',
							  PERBloque7='',
							  PERBloque8='',
							  PERBloque9='',
							  PERBloque10='',
							  PERBloque11='',
							  PERBloque12='',
							  PERBloque13='',
							  PERBloque14='',
							  PERBloque15='', 
							  PERBloque16='', 
							  PERBloque17='', 
							  PERBloque18='', 
							  PERBloque19='', 
							  PERBloque20='' 
							  
							  
							  
							  WHERE PERCodigo='' -->Connection refused