Dsl Creates phone line noise w/ microfilters installed!

[Arin 0]

I just upgraded to dsl and i was told to put microfilters (i think z-filters) on every line not using dsl. well i did that but i still get a small hum/crackel annoying noise. does anyone have this problem?

 

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Athalon 500

196mb Ram

3D prophet ddr-dvi geforce

SB Live! sound card.

biostar m7mka mobo

20 gig maxtor and 3.5 gig fireball

32x tosheba, and adaptec scsi mitsuia cdr 2x4x

ms internet keyboard pro

ms intellimouse explorer

640k DSL on wintell modem with linksys dsl router

100mbit dlink nic w/wol

[Rudyatek 0]

Do you have more than one phone line in your house? I read in one of the manuals that the microfilters only work on Line 1, although I couldn't say why that is..