why wireshark plugin does not work here - dissector_add_uint()

[John x <xiachangqin66 () hotmail com>]

 Hi, folks,

I developed a plugin, and generated the xxx.so file. Then I put the xxx.so file under /usr/lib/wireshark/plugins/xxx.so 
 

when I run the wireshark, it shows: 
      couldn't load module /usr/lib/wireshark/plugins/1.4.4/xxx.so: undefined symbol: dissector_add_uint

I do have a dissector_add_uint function under "rpto_reg_handoff_xxx(void)", before I tried the plugin, I put the 
dissector (packet-xxx.c) under /epan/dissectors/, and it works; but when I want to use it as plugin, it failed. 

Any one can help me?
the following is some information I googled out, but I don't understand it

-------
On Sun, Mar 27, 2011 at 8:02 PM, Guy Harris <guy () alum mit edu> wrote:

    On Mar 27, 2011, at 7:42 PM, Raghavan R wrote:


        I am writing a dissector for a Fibre Channel related protocol and want
        my dissector to get called based on value of fcct.gstype.

    Then you will have to modify the Fibre Channel dissector so that it has a dissector table that uses the value of 
    fcct.gstype to choose which dissector to call.

    At this point, I think one of my biggest mistakes was to give dissector tables names that were the same as the name 
    of the field they used, because that causes a lot of people to think you can use *any* named field as a dissector 
    table.  You *can't* do that; registered fields and registered dissector tables are separate, and almost all fields 
to 
    *not* have a dissector table associated with them (because almost all fields are *not* used in protocol 
    implementations to select which protocol module to hand the packet to).

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