Does anyone know the Correct format for New SqlConnection not using builtin security

Please Help

I have tried many combinations of the following code, What am I doing wrong.

source ="Data Source=TC-EDASERVER08\SOLIDWORKS;Initial Catalog=VendorDb;Persist Security Info=True;User ID=sa;Password=password"

conn = New SqlConnection(source)

conn.Open()

I get a Access is Denied error

The same call works in Visual studio data connector

SolidworksSolidworks Pdm enterprise Pdm