material appeareance - no color when assigning material

Dear All,

 creo material appearance

I observe strange behaviour of creo in assigning colour that match material's appearance setup - part turn white after assigning material.

/my version 5.0.1.0, but it also was in previously installed 4.0/

Behaviour:

• Assign material to a part
  • There is no colour - part turns white from default colour
• I modify the appearance /default appearance/
  • Save this material - by save to library
• Assign modified material to a part colour was taken from the material appearance correctly
• When I turn off the creo and reopen it
• Assign same material modified before
• There is no colour
  • Part turns white In material properties of this material
  • Nearly all colours in material appearances window, turned white

In my config.pro appearance catalog, color.dmt file - is set to default Creo 5.0.1.0\Common Files\graphic-library\appearances

How to fix it? Is there any options that controls this behaviour?

Thanks in advance for your help.

Regards!