WNR1000V3 Folder sharing

Hi community !

First time here and I've searched for awhile for any answer regarding my issue but in vain. Here is the deal, I have 11 PCs and I have a Peabird switch connected to my Windows Server thus allowing me to share internet connection among 7 PCs, good. Then, I have the NetGear WiFi Router WNR1000v3 wired to my Peabird switch, just so I can get WiFi for the last 4 PCs (other RJ45 wires are too short and stuff). I'm able to connect to the wifi router with those PCs BUT, I have a shared folder on one of the PCs wired to the Peabird switch and there's absolutely no way for the other 4 PCs connected via wifi to gain access to it.

As I understood, when I set up the wifi router network, it told me that it will have a different IP from the other network (the wired one being 192.168.1.1, and the wifi one is set to 10.0.0.1) which I can understand very well. But I can't get why it doesn't let me access or even see the first PC network as it is all wired together. I can't seem to find an option to allow the router to get acces to that first network and the shared folder.

I hope I was clear enough and sorry if my english is bad, I'm really trying put down these rocks !

Best regards.