MATLAB MCR async serial communication via Bluetooth

Hi,

I have written a program (in r2011b) for communication with Bluetooth sensors in which I use 'Asynchronous Write and Read Operations'. I wish to deploy the program, so i have used MCR to package up the program. However, after installing MCR and running the program, the Bluetooth communication appears to have broken. I can connect to the BT device using fopen, but fwrite and fread don't seem to work anymore. I have read that the MCR makes use of thread locking. Does this mean asynchronous communication will not work?

thanks

Chris