struggling bad with performance..

i check the performance monitor often to see that the:

pages per sec averages at around 300
average disk queue averages from 3 - 6

i asked the application guys and they had me change a few settings in the pervasive control center...but that didn't do much at all..

all of the users are going crazy..

dual xeon 3.0Ghz with 2GB of RAM..the CPU and RAM are fine performance wise (seems to be so anyway).

any suggestions would be greatly appreciated. thanks