[Serusers] enum parse problem

Hello Everybody, Why enum module is not capable of parsing a response to a naptr query if this response don´t have any Authority and Additional RRs? When it receives some response like this one, it work well: Domain Name System (response) Transaction ID: 0xbe8b Flags: 0x8580 (Standard query response, No error) 1... .... .... .... = Response: Message is a response .000 0... .... .... = Opcode: Standard query (0) .... .1.. .... .... = Authoritative: Server is an authority for domain .... ..0. .... .... = Truncated: Message is not truncated .... ...1 .... .... = Recursion desired: Do query recursively .... .... 1... .... = Recursion available: Server can do recursive queries .... .... ..0. .... = Answer authenticated: Answer/authority portion was not authenticated by the server .... .... .... 0000 = Reply code: No error (0) Questions: 1 Answer RRs: 1 Authority RRs: 1 Additional RRs: 1 Queries 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa: type NAPTR, class inet Name: 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa Type: Naming authority pointer Class: inet Answers 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa: type NAPTR, class inet Name: 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa Type: Naming authority pointer Class: inet Time to live: 0 time Data length: 69 Data: u e2u+sip !^\+351215079290(.*)$!sip:\celso@sip.sapo.pt! Authoritative nameservers e164.arpa: type NS, class inet, ns dasilva.cet.pt Name: e164.arpa Type: Authoritative name server Class: inet Time to live: 0 time Data length: 16 Name server: dasilva.cet.pt Additional records dasilva.cet.pt: type A, class inet, addr 10.112.128.6 Name: dasilva.cet.pt Type: Host address Class: inet Time to live: 1 day Data length: 4 Addr: 10.112.128.6 But when it receives a response like this one, it get a parsing error: Domain Name System (response) Transaction ID: 0xbe8b Flags: 0x8580 (Standard query response, No error) 1... .... .... .... = Response: Message is a response .000 0... .... .... = Opcode: Standard query (0) .... .1.. .... .... = Authoritative: Server is an authority for domain .... ..0. .... .... = Truncated: Message is not truncated .... ...1 .... .... = Recursion desired: Do query recursively .... .... 1... .... = Recursion available: Server can do recursive queries .... .... ..0. .... = Answer authenticated: Answer/authority portion was not authenticated by the server .... .... .... 0000 = Reply code: No error (0) Questions: 1 Answer RRs: 1 Authority RRs: 0 Additional RRs: 0 Queries 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa: type NAPTR, class inet Name: 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa Type: Naming authority pointer Class: inet Answers 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa: type NAPTR, class inet Name: 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa Type: Naming authority pointer Class: inet Time to live: 0 time Data length: 69 Data: u e2u+sip !^\+351215079290(.*)$!sip:\celso@sip.sapo.pt! The reported error on ser debug is: 9(24255) ERROR: get_record: rdata parse error 9(24255) ERROR: get_record 9(24255) enum_query(): No NAPTR record found for 0.9.2.9.7.0.5.1.2.1.5.3.e164.arpa.. Can somebody point us a solution to this problem? Many Thanks, Toni