Error when submitting shoppingcart from script

Hi,

I am trying  to submit shopping cart from script by calling method but I get error as below.

Code is as below

Dim Order As ISingleDbObject = Connection.CreateSingle(New DbObjectKey("<Key><T>Person</T><P>53eeb8b4-8ca4-4a79-a071-5e2aa162cbc9</P></Key>"))
                Order.Custom.CallMethod("OrdershoppingCart", uidOrder, True)
                Order.Save()
Error I get as below
"Method OrdershoppingCart (System.String, System.Boolean) not found in Object  Sanjana (2TSTF-MUDVASHERRY2)."

Do you have any idea waht is wrong.

If you have any sample code can you please put here.

Thank you in advance.

Kind Regards,

Dnyandev