Sound bleed audio problem - Can anyone help?

Sound bleed audio problem
Hi all. Some of you commented on how muffled this recording was last week.
Here: >>> http://forum.bandmix.com/viewtopic.php?t=7294
I think I've now found the problem but no matter what I try I cannot rectify it.
Wondering if anyone with a similar setup can help witht this please?
For Example:
I record one track.
Add a new track and add another instrument.
If I then just let it record without adding any noise I get a faint, well not so faint copy of what was on the previous track. All in all this is messing with anything I trty to do and this happens both in cakewalk and Cubase.
I take it this is a sound card issue or how the mixer talks to the sound card perhaps? In any case I cannot do anything at all until this problem is fixed to some degree.
System setup is posted below in as much detail as I could get. Another problem in Cubase shows ASIO4ALL and although it is installed I cannot get to the control panel aftere uninstalling having thought that this might be the cause? All I see are uninstall options.
Many thanks indeed to anyone who can help me out with this issue.
========================
System:
Windows XP
1 Gig memory
Audiophile 2496 sound card
Eurorack UB802 external mixer
Cakewalk Music Creator 3
Cubase 3
Asio 4all <<<
Setup: Mixer.....
Tape out from Eurorack to audiophile in.
Tape in from EuroRack to AudioPhile out.
Main out to Sound system.
Channel 1 All instruments ANALOG. (Line in)
AudioPhile 2496 setup:
Monitor/Mixer
Master Volume -34 (Stereo Link)
Waveout 1/2
Waveout S/pdif
HW/ in S/PDIF
HW in 1/2
Above all are at the bottom. Mute/Solo/Stereo link All UNCHECKED
Patchbay Router tab:
WavOut 1/2
HW out S/PDIF
Both are checked
H/W out xxx
H/W out xxx
H/W out xxx
All blanked out.
Hardware tab:
Internal Xtal CHECKED
Codec Sample rate 22,050 CHECKED
Latency 256
Asio options
Disable audio app use of monitor mixer and patchbay router SELECTED
S/DIF tab:
Consumer CHECKED
Windows sound control
Volume tab:
Sounds and audio devices (Windows)
Volume slider not working
Sounds tab:
Sound scheme = Windows default
Audio tab:
Sound playback = M-Audio Delta AP Multi
Sound recording = M-Audio Delta AP 1/2
Volume cannot be adjusted for sound recording?
Midi Music playback Microsoft wavetable SW synth
Voice tab:
Voice playback = M-Audio Delta AP Multi
Hi all. Some of you commented on how muffled this recording was last week.
Here: >>> http://forum.bandmix.com/viewtopic.php?t=7294
I think I've now found the problem but no matter what I try I cannot rectify it.

Wondering if anyone with a similar setup can help witht this please?
For Example:
I record one track.
Add a new track and add another instrument.
If I then just let it record without adding any noise I get a faint, well not so faint copy of what was on the previous track. All in all this is messing with anything I trty to do and this happens both in cakewalk and Cubase.
I take it this is a sound card issue or how the mixer talks to the sound card perhaps? In any case I cannot do anything at all until this problem is fixed to some degree.
System setup is posted below in as much detail as I could get. Another problem in Cubase shows ASIO4ALL and although it is installed I cannot get to the control panel aftere uninstalling having thought that this might be the cause? All I see are uninstall options.
Many thanks indeed to anyone who can help me out with this issue.
========================
System:
Windows XP
1 Gig memory
Audiophile 2496 sound card
Eurorack UB802 external mixer
Cakewalk Music Creator 3
Cubase 3
Asio 4all <<<
Setup: Mixer.....
Tape out from Eurorack to audiophile in.
Tape in from EuroRack to AudioPhile out.
Main out to Sound system.
Channel 1 All instruments ANALOG. (Line in)
AudioPhile 2496 setup:
Monitor/Mixer
Master Volume -34 (Stereo Link)
Waveout 1/2
Waveout S/pdif
HW/ in S/PDIF
HW in 1/2
Above all are at the bottom. Mute/Solo/Stereo link All UNCHECKED
Patchbay Router tab:
WavOut 1/2
HW out S/PDIF
Both are checked
H/W out xxx
H/W out xxx
H/W out xxx
All blanked out.
Hardware tab:
Internal Xtal CHECKED
Codec Sample rate 22,050 CHECKED
Latency 256
Asio options
Disable audio app use of monitor mixer and patchbay router SELECTED
S/DIF tab:
Consumer CHECKED
Windows sound control
Volume tab:
Sounds and audio devices (Windows)
Volume slider not working
Sounds tab:
Sound scheme = Windows default
Audio tab:
Sound playback = M-Audio Delta AP Multi
Sound recording = M-Audio Delta AP 1/2
Volume cannot be adjusted for sound recording?
Midi Music playback Microsoft wavetable SW synth
Voice tab:
Voice playback = M-Audio Delta AP Multi