I have problem with my MSP430F5503 and connecting it to the PC via USB. I'm trying to execute SD-Card Reader example project on my board. But I couldn't execute the project although I made the necessary adjustments (like microcontroller selection). I realized that when I call the USBMSC_poll function I can't debug the code on the contrary when I don't call that function I can debug the code but in this situation my MSP430F5503 can't connect to the PC via USB.Because USBMSC_poll function looks like a critical function.
What could be the problem and how can I solve this connection problem?