Repost : urgent : Client callback problem

[John]

Hi all,

Perhaps I'm being a little impatient here but I needed to re-send with a
metter of urgency...

I'm trying to get a client callback to work and am able to get it to work
when I comment out a section of other, non-related-client-callback code.

Within my "If not page.ispostback" section, I do a databind on a gridview as
well as a dropdown box. The callback itself is fired off in an "onchange"
event of a completely different textbox. If I comment out the
object.Databind() lines for botht the gridview and dropdown box, the call
back works as expected but if I include the Databind lines, an error is
generated and if I alert the error in my Javascript, I simply get the whole
HTML page.

Any ideas what could be happening here and more importantly how to fix this?

Regards
John.