What Shiva said is absolutely Right.
If you Schedule your second Task Properly depending upon first Task
than it will display below message:
"When Your_Application_Name.qvw has succeeded"
Just to check whether there is problem with Code or Syntax in Second Task (QVW):
Reload the Second task Manually which is Failing.
If the Second Task (QVW) runs Manually without any Error, than first check the Logs which will show
you the reasons for its Failure.
Finally, in your Mounted Folder (Publish Folder), First Copy the Second Task (QVW) in Some Backup Folder
than Delete the it.
After doing this, Simply Copy & Paste the Second Task (QVW) from Backup Folder to your Main Mounted Folder (Publish Folder) from where you have earlier deleted the Second Task (QVW)
Hope that helps you.