Bicycle Mechanics - Bottom Bracket Noise

This season I installed a Record 10 bottom bracket into a Giant aluminum compact road frame. After about 500 miles the bottom bracket started to make a creaking noise within the frame shell. I disassembeld the BB, generously applied grease to the threads and reassembled. The noise stopped but for only a few hundred miles. Yesterday I dissasembled the BB again and this time applied two wraps of teflon pipe tape to the threads. The noise is still there, it just changed tone and freqency now. Any suggestions? I don't know what to do now and I'm looking forward to a quite peacefull ride again someday. Thanks
The Fife

Fife,
have a qualified bike mechanic take a look at your bike, and having an expensive bike frame and an equally expensive group, I* would advice that better see a qualified bike mechanic,

I had creaking bottom bracket,
every time I serviced them noise went away, only
to return in a few weeks (depened on milage).
Found that the crankarms were loosening enough
to creak, I now check them regularly for play
etc. no creaks since.

Marty

I don't think the crank-arms are making the noise because I tourque them to 25 ft lbs as recommended. I'd like to greese the spindle to cranarms but I understand that we should not greese square taper type crankarms so I avoid that. I'm thinking of packing the BB threads with some heavier weight greese and see what that does. Before I take it apart again I wanted to get some opinions from you experts out there.

I think its definately your crankarms...could be that they were overtightened at some point and now 25 ft/lbs is not enough to keep them from shifting on the square taper? I hear some people put teflon tape and/or grease on the spindle and then torque it down. Otherwise... I think you should get new crankarms and go ISIS!

After all this. I didn't have the casette threaded lock-ring tight enough. Bike is silent now. Thanks for the advice.