Can't get BLFS on Yealink EXP40 with first name and last name?

[John14]

So i'm using a custom template with this code for the BLFS to work on my EXP40:

{IF blf1}
expansion_module.1.key.1.type = %%DKtype%%
expansion_module.1.key.1.line = %%Line%%
expansion_module.1.key.1.value = %%blf1%%
expansion_module.1.key.1.extension = %%PickupValue%%
expansion_module.1.key.1.label = %%blflastname1%%, %%blffirstname1%%
{ELSE}
expansion_module.1.key.1.type = 0
{ENDIF}

If i swap around blfs last name and first name it'll show "%%blfsfirstname%%" on the EXP40 instead of the name i've given it. if i use this code above it works but only shows last name, first name. Is there anyways of fixing this?