How do configure router-on-a-stick for multiple switches?

Hi, first of all, my apologies if this post isn't in the correct forum, it's my first time/post here.
Anyway, i've attached a link to the packet tracer file below. So currently, i've set up the appropriate vlans on all the access switches, i've also set up the trunk ports from the access switches to the distributor switches. In addition, i've also configured the sub-interfaces on the router. At the moment, the "server" end devices are able to ping each other. however, all the other end devices can't seem to do the same. I was hoping someone with more knowledge could help me out. I don't want answers per se, just what i have done wrong so i can learn and fix it. P.s the console password is "cisco" and enable password is "class" if you need to see the configurations.
https://www.4shared.com/file/9eaL2VM_ca/Pat_packet_tracer.html
Thank you so much in advance.
Anyway, i've attached a link to the packet tracer file below. So currently, i've set up the appropriate vlans on all the access switches, i've also set up the trunk ports from the access switches to the distributor switches. In addition, i've also configured the sub-interfaces on the router. At the moment, the "server" end devices are able to ping each other. however, all the other end devices can't seem to do the same. I was hoping someone with more knowledge could help me out. I don't want answers per se, just what i have done wrong so i can learn and fix it. P.s the console password is "cisco" and enable password is "class" if you need to see the configurations.
https://www.4shared.com/file/9eaL2VM_ca/Pat_packet_tracer.html
Thank you so much in advance.
Comments
Do you have connectivity between the switches? Does "show CDP neighbor detail" work as expected?
Are you using DHCP? If so, are the devices getting an address? If not, where's the server and is an ip helper needed?
Are the default gateways configured correctly?
What does the arp table look like?
But basically, if you have router on a stick set up correctly between the router and the switch that it's plugged into, and you have the trunks set up correctly between all the switches, then you should have full network connectivity. EANx is right, start at layer 1 and work your way up, but my guess would be the trunk between the router and the switch that its connected to.
https://www.4shared.com/account/home.jsp