Harvard Style Referencing.

[Gayle Tan]

Hi,

I'm a new lyx user. I'm thinking of using lyx to write my dissertation
in finance.
My university uses the harvard style with some modifications, i
downloaded harvard.bst and i tried using it. i got the following
error.

Undefined Control Sequence
\harvarditem
               [Chan et~al.]{Chan, et~al.}{1990}{Chan:1990qy}


Can anyone help


Thanks.
Gayle