WSALookupServiceBegin() with bluetooth problem

Hi, I work on a multithreading application which use Bluetooth for recieve data from devices. Language is Native C++.
Each device is serviced by its own thread. I use Windows Sockets to interact with BT-devices, so to search BT-devices, I call the. WSALookupServiceBegin() function, then WSALookupServiceNext() and at the end WSALookupServiceEnd(). I have to perform searching procedure not only at the start of the program, but periodically, in order to work with newly paired BT-devices.
When I call the WSALookupServiceBegin() function and don't interact with any BT-device at the same time everything works fine, but when I call the WSALookupServiceBegin() while other thread is interacting with a BT-device, I get an exception: Unhandled exception at 0x000000013FC057B2 in ASUPTerminalBT.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF. This exception throws when program tries to send a data to the BT-device. It seems like WSALookupServiceBegin() does something whith memory allocated for the device address. I'll be very appreciate if you help me to solve this problem.