add transistor model to LTspice
If the model definition is a whole subcircuit (starts with .SUBCKT), you need to use the X prefix: Ctrl + Right click on the component, and set the prefix value to "X".

Also check that the Value is set according to the name of the SUBCKT.

Also check that you have an ".include" directive somewhere on your schematic, set with the correct path of the file. Alternatively, you can paste the entire component description within a spice directive block on your schematic, but it takes a lot of space.

I wouldn't recommend putting the definition within standard.bjt file, as you seem to have done. I think you can't put whole SUBCKT in there (I also seem to remember it requires restarting LTSpice).