snort windows setup error

[dark spider <darksp1d3r () yahoo com>]

Dear all,
 
When i try to install snort on windows, I've got this error 
 
"The procedure entry point PacketGetNetInfo could not be located in the dynamic link library packet.dll"
 
I already install WinPcap before installing snort.
 
what sould i do.
Many Thanks 
darksp1d3r


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