[ZOPE] : problem with Tree tag

[K H Subrahmanyan]

hi,

  I am using ZOPE for my project.
Actually I have to display the employee hierarchy in my page whose ever
required.

For that I take the Emp_no. in the first page and when I submit the form it
will go to the next dtml method in which I call the tree tag. It will work
fine in the first page.
If I try to expand the tree by clicking the PLUS sign it will give error.

Key Error: Emp_no.

Can any body help me.
thanks in advance.
subrahmayan.