Well, your zone seems to have two declared nameservers, according to the glue records:
[me@risby personal]$ dig ns mediapal.biz @a.gtld.biz.
[...]
mediapal.biz. 7200 IN NS NS2.mediapal.biz.
mediapal.biz. 7200 IN NS NS1.mediapal.biz.
;; ADDITIONAL SECTION:
NS1.mediapal.biz. 7200 IN A 69.197.146.43
NS2.mediapal.biz. 7200 IN A 69.197.146.44
Neither of these nameservers seems very responsive:
[me@risby personal]$ dig soa mediapal.biz @69.197.146.43
[...]
;; connection timed out; no servers could be reached
[me@risby personal]$ dig soa mediapal.biz @69.197.146.44
[...]
;; connection timed out; no servers could be reached
So either your nameservers aren't serving that zone to general requestors, or they're behind a firewall that's not properly configured, or something else is wrong: from outside, it's impossible to say more. But if you're sure those nameservers are up and accessible, I'd urge you to (a) say so, and (b) show us some evidence.
And thank you for not redacting the domain; these questions are nigh-impossible from people who insist on not telling us the domain in question.