How to add parameter to calling action

[nitin singh]

I tried adding parameter to calling action by right clicking the expert view->action -> action properties -> parameter tab
In the input parameter i added
input1 = 1
Then error message displayed
"The parameter name you specified is not valid"

Please help me out.
Thanks

[ravi.gajul]

    You are not supposed to give input1=1 in the name tab
under Name give input1 and underdefault value give 1
Please see the attachment.