nssec2.VDSINA.RU has no TXT records.
Question and response
Question
dig nssec2.VDSINA.RU. TXT
Answer
The response has no answer records.
Authority
VDSINA.RU. 600 SOA nserver1.VDSINA.RU. info.VDSINA.RU. 2013033676 10800 3600 172800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0