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PCI2050B: My PCI2050B can not work

Part Number: PCI2050B

Hi All:

I use PCI2050B to extend CPCI Backplanes 's slot No. 

The appearance as follow :

1,System board insert , i don't insert PCI2050B card,system board can work and power on .I can see winxp desktop on my display .

2,System board and PCI2050B are all insert ,system board cann't power on,i can measure the P_CLK , But i cann't  measure S_CLKOUT0~S_CLKOUT8,they didn' t output anything.Then, wait some time ,system board  reset ,i can measure they output CLK just one time ,then they cann 't output anything again ,wait some time ,system board reset again ,S_CLKOUT output again ,just one time .then repeat again...........

Please help me ,thank you.