PgAccess Scripts & Forms

I have problem of scripts in PgAccess. Which is as follows :
I developed a form say form1.
A startup script Scripts::open "form1 startup" connects all entries in form1 with a namespace eval DataControl(.form1.query1) { ... } in the same form using .form1.entry$x configure -textvariable DataSet(.form1.query1,variable_x) .
Now, I call another form by a button it the form1. This form2 searches for a Patient's record in the database. If record is found, then it should call a Script which gets data for that Patient from different tables. This data should be displayed in form1 entries.
So, in that script (for retrieving data) I use namespace eval DataControl(.form1.query1) { setSQL "select ...." open ... }
But this gives error that Unknown command 'setSQL'. If I use the same command in same namespace in the form2 itself, it works fine. Why it is so?
Why the namespace does not work alike in Forms and Scripts? I have specified some variables for status using namespce eval MainSpace { variable x; variable y; ... }. These variable can correctly be used in forms and scripts as $MainSpace::x, and so on.

Thanks in advance,
Sincerely yours,

Jigishu Bhatt
p.s.: Details of my platform, etc. can be found in my earlier emails.