D3m, a few questions.
Can your wireless laptop connect to the internet?
On your network, do you have a combined WiFi router or a separate wireless access point and router.
How are you trying to connect the two? The laptop should connect just as your PC does - only difference is the physical method of connecting.
Have you checked that the firewall on the laptop is not blocking the NAS IP?
Without having a better understanding of what you have and how it is setup it is very difficult to even start trying to advise you what to do. For example, we had a client that couldn't connect to his NAS by wireless but every time he brought his netbook in it connected to our public NAS without problems. In the end one of our service engineers went to look at his setup - he didn't have a wireless router or AP, his netbook was connecting to the internet via the WiFi next door. When we supplied an AP and set it up he had no more problems. All this shows that as much information about the problem helps to leading to a successful conclusion.