Here's the product page for for the PowerMaster, the manuals and tips are downloadable there: Lionel 6-24130 TMCC PowerMaster
Again, did you set the switches correctly?
First off, the CMD/CONV switch should be in the CMD position. The 135/180 switch should be in the 135 position for that brick. Finally, the PROG/RUN switch should be in RUN.
You need to use the TR key to select the train # programmed into the PM. If you don't know what it is, set the PGM/RUN switch to PGM, press TR, #, and SET. The # is the train number you want it to respond two, from 1 to 9, a single digit.
Here's the command operation page for the PowerMaster.