authentication keyword with variables parsed incorrect

[nevian427]

Hi, I'm trying to use template as auth [authentication username=[field1] aka_AMF=[field4] aka_OP=[field3] aka_K=[field2]]

But no matter of order of fields first one goes to begin of string and auth fails 001019901003516[authentication username=@ aka_AMF=0x0000 aka_OP=0x00000000000000000000000000000000 aka_k=test]