da Vinci 1.0 cannot print PLA filament I bought new yellow PLA filament from XYZ (1.75&nbsp;mm). 

Over the past I have printed many objects with my da Vinci 1.0 (ABS only). I found that while the brim is being printing (using default configuration of XYZWare; the da Vinci machines give the user very little control over print parameters, if I remember correctly the temperatures are controlled by the chip in the filament cassette), filament stopped extruding from my extruder immediately. However, ABS can be printed properly. 

Could anyone tell me how can I work around ?
The answer to this specific instance appeared in the comments:


  Also, a thorough cleaning of the nozzle/hotend might also be a good idea to get rid of all the stuck ABS residue inside. – 0scar Mar 26 at 8:44
  
  The problem solved !, my ABS is stuck in nozzle !!! – 3ORZ Apr 25 at 6:52