you have to ask your supplier, how to change the baudrate, but probably it is with the same method with mine.

connect to adapter by terminal, and send the necessary commands.

I am talking about the bt-rs232 adapter.

what is the brand name or the model of the adapter?? do you have a picture?

Inside adater tehere is serial bletooth link, you can adjust the baudrate of the link,
I dont know your specific adapter but
here is the setup for what I use

http://apirola.wordpress.com/2012/09/05 ... oard-v1-2/

Sdid you try changing the baudrate of the bt adapter by connecting from telnet?

If you didnt maybe you need to lower the internal baudrate of the bt adapter

Which version of Vemstune are you using? which firmware are you using?

VemsTune-c.exe is the same program, but it opens another window on the back as console, so you can see more output.

You have to disable baudrate change, as bluetooth adapters are more happy with constant baudrate

If it connects but the connection is not constant, try a lower baudrate.
If you still have problems than please run vemstune-c.exe and chech if there is any errors on the console.