Rest Service appears in gray scale

Hi,

I just made an application from Arcgis Viewer for Flex 3.5 using Map Service from Arcgis Server 9.3.1. Why does the map appear in gray scale ?

Attachment 29706

I tried to make an app with arcgis server wizard, the map appears in color.

FYI, The map service has 3 layers (1 basemap and 2 operational) taken from arcgis server local. The map service is very simple, just single color. and its a dynamic map service

Please help...

thanks

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