(ASP.NET) User control browser unable to gain focus

[ASP.Net programmer]

I already posted this in the ASP.NET framework group, but no one could help
me there. Maybe someone in here has encountered this problem:

I have a very weird problem with an ASP.NET page I developed in Visual
Studio .Net 2003:

The page has an asp panel which contains a user control (to keep it in a
certain place). The User control contains a HTML grid layout panel to
keep the layout of the textboxes as I want it.

When I run the page in IE6 SP2 I can normally access the user control,
enter some values, push a button and see the results: The page runs as
expected.

When another user runs the page on another computer (same hardware, same
browser version) he can't enter data into the user control. He can click a
button, but the page returns an error (just a blank page with the aspx page
as a referrer).

Some one else in the asp.net group suggested to check the traces of the
requests, but there are no differences.

Has anyone else had this problem or knows a solution?

Thanks in advance

[ASP.Net programmer]

"ASP.Net programmer" <[e-mail]> wrote in
news:42***********************@news.xs4all.nl:

I already posted this in the ASP.NET framework group, but no one could
help me there. Maybe someone in here has encountered this problem:

I have a very weird problem with an ASP.NET page I developed in Visual
Studio .Net 2003:

The page has an asp panel which contains a user control (to keep it in
a certain place). The User control contains a HTML grid layout panel
to keep the layout of the textboxes as I want it.

When I run the page in IE6 SP2 I can normally access the user control,
enter some values, push a button and see the results: The page runs as
expected.

When another user runs the page on another computer (same hardware,
same browser version) he can't enter data into the user control. He
can click a button, but the page returns an error (just a blank page
with the aspx page as a referrer).

Some one else in the asp.net group suggested to check the traces of
the requests, but there are no differences.

Has anyone else had this problem or knows a solution?

Thanks in advance

Nevermind, it was a security feature I forgot I had in there. I had
created a class that could make the textboxes read-only... :(
At least it's solved now. It had nothing to do with ASP.Net