Page 2 - String To Smallmoney - Sql2000

the placeholder approach works nicely with an insert statement and I've tried it with an update statement but keep getting an error. This is the current code:

Var1 = strArray(1)
Var2 = strArray(2)
Var3 = (strArray(3)


Cmd.CommandText = "UPDATE WBS.dbo.pludec38 SET PLU = ?, SET Dscrpt1 = ?, SET Price = ?"

Cmd.Parameters.Refresh
Cmd.Parameters(0) = Var1
Cmd.Parameters(1) = Var2
Cmd.Parameters(2) = Var3

Cmd.Execute

The error occurs at or near the refresh stmt. What am I doing that is causing this? And what is the difference between this and the insert. The insert uses the parameters block without choking.
Thanks
RK