I am trying to interface my application to a PCI6601, but keep getting -10121 errors with the GPCTR_Control and GPCTR_Set_Application Nidaq functions. I am sending the Board number as a short, Counter number as a Cstring(Null terminated), with a value of ND_COUNTER_0, and an action of type Cstring(null terminated), value ND_RESET. I am using Nidaq Version 6.9.2. What am I doing wrong?