Datafeed toolbox,Problems with blp connection

Hello!

I would like to download Stock prices from Bloomberg. The bloomberg connection is working, but not the blp (that seems to be better).

I sownloaded the server API and I added a Startup M-file with the following code to add the java file

if true
  javaaddpath({'C:\blp\ServerAPI\APIv3\JavaAPI\v3.4.8.1\lib\blpapi3.jar'});
end

But if I try using blp it gives me the following error:

??? Undefined function or variable 'blp'.

I hope someone can help me.

Gaia