Question about running interactive program in xterm session

[Milind Potdar]

Environment - 
-----------

NT 4.0

xterm version 4.2.0(165)

What I am trying to do
----------------------

Run isql ( interactive sql )
When you run isql interactively, you get a prompt
1>

Behaviour
---------

If I open xterm session & try to run isql, all the prompts from isql "do not" 
come to screen. But otherwise it behaves perfectly ok. ie you input sql commands 
& get back results.

It is as if there is some special buffer which stores whatever isql is prompting 
but it is not getting flushed. At the same time sql command results come back & 
are visible.

>From normal cygwin command shell, there is no problem with isql execution.

Has anyone experienced similar problem ?
Is there any xterm property which needs to be set to make this work ?

Thanks in advance for any help

Milind ..