LR Controller is hanging when it is invoked from commandline

Hi All,
I'm using LoadRunner9.5 version, when I invoke the LR Controller using Command Promt with the command Wlrun.exe -Run -TestPath "C:\Program Files\HP\LoadRunner\scenario\Scenario_new.lrs" -ResultName "C:\Program Files\HP\LoadRunner\scenario\LRResult"
its invoking the controller after that its hanging for a long time.
Could anybody tell me how to fix this problem.
Thanks in Adavance,
Rajesh