Another network and NAS problem

[boybi]

I have a Network Attached Storage placed in my room attached to the wifi router where my DSL modem is connected. I have another wifi router setup as AP that is connected to the main router via UTP cable.

I have put all my MP3s in the NAS. When I access these MP3s via my PC in my room, they play smoothly as if they're stored in the PC's hard disk. But if I play these MP3s using another computer that is connected to the AP via wifi, the songs skip every few moments.

The signal strength between the other computer and the AP is 4 bars. What seems to be the problem?

[jatcos]

Possible problems are

Bandwidth congestion resulting to high latency and transmission delay
Interference causing low throughput

Try using 802.11n router/receiver and check if it will improve.

[boybi]

I just noticed that the wifi connection between the PCs in the office and the AP keeps on disconnecting. I noticed this through the frequent popping-out of the network connected notification from the tray. Anyway to fix this?