I had recoded a sample script in QTP and when i am trying to play back i am facing the above error.....
I mean when i click on run it is throwing the error...
According to the screen shot u have attached, code writtent to login into application is in action 1.
Now did u made a call to this action or ur script is directly running from action1.
The error u r getting is related to calling an action. So please check if u r calling an action or not.