Object Required Error - Adodb Parameters

I'm using the following and getting an "Object Required" error on the cmd.Parameters.Append line of code. I can't for the life of me figure out why. Can anyone help?

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Also posted on Ozgrid

Got the answer from the Ozgrid post:

Either I need to take the parentheses off of par or else add Call infront of the line of code. This is an example of VBA syntax which just baffles me.