PROBLEM RECORDING MORE THE ONE TRACK

Hi everybody: I am using GTP3 with M-Audio Firewire Audiophile and i have set up the sound card with Window 2000. I don't have problem recording, or playing the instrument, I hear the music in real time just fine when i using record button and when i play. The problem is the playback or when i want to hear the idea. is doing popup and noise and running slow, and if i use another track to record is doing more pop and more noise. In Audio Option Playback Timing Master I am using M-Audio FW ASIO Analog Out 1/2 FW AP, In Record Timing Master M-Audio FW ASIO SPDIF ln L FW AP. Audio Driver Bit Depth: 24, The Default Settings for New Projects, Sampling Rate : 44100, The File Bit Depth:16. Mixing Latency; Buffers in Playback Queue:2. Buffer Size: In Fast Effective latency at 44kHz/stereo: 1.5 msec. If any body know if i need to make more setup or where i can fit the problem, Please let me know i really be grateful. THANK YOU.