fluiducts fluiducts not working

[7Fuzzy]

hey all,

im having a problem with fluiducts from TD and the sewer and composter from minefactory.

I made a very simple system. just some fluiducts connecting between the sewer and the composter.

it worked for a few seconds' but then it stoped tranfering sewage although i connected the ducts proparly with servos (they are not depending on redstone - i did it in this always active mode) and the sewer is full of sewage.

im adding pictures of what i built.

can someone spot the problem?

p.s, earlier i tried to do the same thing with the grinder and the auto spawner - same problem