Wrong color in SP 3.1

Last week, I install thesp3.1successfully, but, in assembly, all parts in"lightweight"becomes in orange color!!!!Before install sp 3.1, it wasOK.
Its was saved in natural grey of solidworks.
This happened withyou?
Thanks
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Maciel Fernando Gabriel. / Brazil - SP
Solidworks 2007 sp3.1
Video: 256Mb / Processor: Atlos 2,0Ghz / RAM: 1Gbz / Winxpsp2
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