When a plugin isn't working like it should, you should check for runtime-errors.
Code:
L 04/19/2011 - 02:53:39: Invalid function "VIPCTMenu_Handler"
L 04/19/2011 - 02:53:39: [AMXX] Displaying debug trace (plugin "test.amxx")
L 04/19/2011 - 02:53:39: [AMXX] Run time error 19: function not found
L 04/19/2011 - 02:53:39: [AMXX] [0] test.sma::VIPCTMenu (line 101)
L 04/19/2011 - 02:53:39: [AMXX] [1] test.sma::cmdVmenu (line 93)
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