EXTEN:1 fail

i’m trying to make asterisk dial ENUMLOOKUP(+494212181) by using sip
the request invite is "sip:0494212181@"
the exten => _X.,1,Set(result=${ENUMLOOKUP(+${EXTEN:1})}) fail
result seem to be empty …the next line : exten => _X.,2,Dial(${EXTEN})
is using 0494212181 as the exten… and fail because no exten like this is define .

  1. the EXTEN:1 was suppose to remove the leading 0
  2. the ENUMLOOKUP doesn’t work …no enum lookup is made .

the exten => 123,1,set(result=${ENUMLOOKUP(+494212181)}) works ok

why doesn’t the EXTEN … works