Problem whit rendering scene with a light source

Hello list,

I am trying to simulate a scene of light source behind a glass. The image is
part of a general simulation.

When I am trying to simulate the results are the following:

pfilt: picture too dark or too bright
rad: error filtering view sun
        lab_6i2_sun.pic removed

If you have any idea, it would be highly appreciated

Thank you

Sotiris Papantoniou

P.S. I am sending the files of the simulation to help.

filter.rad (117 Bytes)

geometry_6i.rad (293 Bytes)

lab_6i2.rif (836 Bytes)

light.rad (100 Bytes)

material_1.rad (296 Bytes)