animation render with yafaray+blender 2.5 / problem

hi friends,
i am trying yafaray renderer for last two days in 2.5and ubuntu flat form, no issues in single frame render. when i render the animation the problem starts.
The problem:
start frame - 1
end frame - 50
if i start the animation render , it creates yafaray file in output directory , after rendering it renaming file as yafaray0001.tga, again it is rendering the same frame and naming it as yafaray0002.tga .continuously rendering the same single frame , this process is continues. i cant find the solution. so i cant render my animation. plz help to find the solution…

Sounds like you have found either a bug or an incomplete feature.
Remember the 2.5 exporter is still experimental, and is not considered stable. The best I can suggest is to contact the author of the exporter.