spy uses entry-url/google-task-bar

i am setting up a w2k-pc-pentium 4. unfortutantely i did not install all antyspy-programs from the beginning. firewall/antivirus was setup from the start. now i have a problem concerning internet explorer 6.o(i have netscape navigator 7.o too)
i installed google-taskbar(the google-window). when i start i am not directed to http://www.bluemail.ch but eighter passed through this:
http://sbjr.com/passthrough/index.html?http://www.bluemail.ch/index_d.html

sometimes i will find myself at the bluemail-adress and i can see the sbjr-taskbar below.
sometimes i cannot enter the internet. what can i do? all following programs did not help. spybot and webwasher were isntalled befor the incident. these ones were installed after: regclean, regcleaner, spyblocker, cookiecooker

no spys and trojans are reported.