Unable to get the counters in'view log data'

Hi!
I want to analyse the log file generated by the perfmon with th e help of graph.
I am following this method
click on the 'view log data' icon
adding the log file
then adding the data.Here I am stucked.When I click on the add button to add counters which i want to view ..i get a new dialog box.In this box I have only 2 objects :memory and processor.I cant see any of the sqlserver objects and its associated counters.
I need these counters to analyse my log file.
the log file which i maintain consist of almost all use ful counters for checking the performance of sql server.
Pls help