Problem with pcap_compile function.

[narmada <narmada () efftronics com>]

Hi
 I am using wpcap.lib for packet capturing in my application. my 
application is written in delphi. i can able to getting packets. But 
when i am applying filter to the device it is not able to apply filter 
to that.. The pcap_compile function returning -1 value.. Can u please 
help me why its giving -1.. and suggest what to do for applying filter 
to the device..?

Please reply me as early as possible.

Thank u.
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