Postgres error

Dear friends,

I am getting the following error when I start Postgres 8.1 from the command
prompt on windows:

pg_ctl start -D e:/crisilfe/crisil/pgsql/data
postmaster starting

E:\Crisilfe\Crisil\pgsql\bin>LOG:  could not rename file
"global/config_exec_par
ams.new" to "global/config_exec_params", continuing to try
pg_ctl start -D e:/crisilfe/crisil/pgsql/data
pg_ctl: another postmaster may be running; trying to start postmaster
anyway
FATAL:  lock file "postmaster.pid" already exists
HINT:  Is another postmaster (PID 2672) running in data directory
"e:/crisilfe/c
risil/pgsql/data"?
pg_ctl: could not start postmaster
Examine the log output.

Can someone thro some light on what causing this. Need urgent help...

Regards,
Ritu
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