Ship Confirm not working as expected in my case

 

I created a Sales Order using a xml request and updated it for ship confirmation using a xml request, Following are the calls I made to achieve this.

Sales Order creation:

<jdeRequest type='callmethod'>

<callMethod name='F4211FSBeginDoc'>

</callMethod>

<callMethod name='F4211FSEditLine'>

</callMethod>

<callMethod name='F4211EndDoc'>

</callMethod>

<callMethod name='F4211ClearWorkFile'>

</callMethod>

</jdeRequest>

I see Sales order is created with 

 <param name="szLastStatus">560</param> 

  <param name="szNextStatus">585</param>

But after the following I don't see either szLastStatus or szNextStatus updated.

<?xml version="1.0" encoding="UTF-8"?>

<jdeRequest>

   <callMethod name="GetLocalComputerId">

</callMethod>

   <callMethod name="F42UI05EditLine" >

</callMethod>

   ...

   <!-- Ship Confirm End Doc -->