How to connect to shared devices (RAID) on a network (iMac)?

I shared a RAID on my network -- it is connected directly to an iMac. Well, my PCs were able to find the shared RAID on the network and connect wirelessly without any problems. However, my MacBook Pro will not recognize any devices on the network. So, my question is, how can I connect my MacBook Pro wirelessly to the RAID which is connect to my iMac and shared on the network? Keep in mind, the PCs were able to find the RAID without a problem. Thank you!