Mark Complete button issue in plugin

Hi,

I have plugin registered on "SetStateDynamicEntity" message on post operation, that checks the status of the phone call record when a phone call is closed.

When I close the phone call "made" using the CLOSE PHONE CALL button then got the status reason value as 2 inside the plug-in.

But when I use the MARK COMPLETE button the status reason value returned is -1.

Here is my code.

Int32 statusvalue = ((OptionSetValue)myContext.InputParameters["Status"]).Value; 

Any help would be appreciated.

Thanks 

Balasaheb