BIND Setup HELP Please!

Hello everyone,
Ive been going crazy all day trying to figure out this Bind business. After reading forums for 7 hours and troubleshooting, i finally have it starting up error free (at least i believe so).

i tried a dig and a host query thing and this is what i recieve:

host mydomain.com
mydomain.com has address 192.168.1.151


and my dig results are

i still cant connect to any of my domain pages (eg mark.mydomain.com)

any help would be appreciated, i am stumped

 

currently hosting internally

 

Do your PCs use your internal DNS server, or do they use another one (e.g. the one from your ISP)?