No application 'IF' for extension, whats wrong?

I try

[**620] exten => _[0-9*].,1,Set(ziel=${SIP_HEADER(To)}) same =>n,Set(ziel=${CUT(ziel,@,1)}) same =>n,Set(ziel=${CUT(ziel,:,2)}) same =>n,IF(${ziel} = ${CONTEXT}]?Dial(SIP/ext1):Goto(${ziel},${ziel},1))
however Asterisk Console just Outputs

WARNING[2582]: pbx.c:4218 pbx_extension_helper: No application 'IF' for extension (**620, **620, 4) == Spawn extension (**620, **620, 4) exited non-zero on 'SIP/fritzbox620-00000017'

What am I doing wrong?
module show outputs among others "func_logic.so Logical dialplan functions 0 " So func_logic is loaded

core show application GotoIf

Regards

Or core show application execif