ASP.NET web app works on some, not all, workstations

[=?Utf-8?B?SkdASEc=?=]

I have a client that has contracted with a bank to process checks over the
Internet. The solution includes a check scanner and APS.NET web application.

The application does not work for all workstations at the client site.
There are two laptop computers than can run the web application and all it's
functions w/o failure. They have been able to do this from day one w/o
modification.

No other PC workstations can run all of the web application functions. Some
page return an 'Internal Server Error' message. The page displayed is a
custom error page with no other details.

For some reason the owners of the web application have no clue why their
application will work for some, but not others.

Some facts:
All workstations are XP SP2
There is a mix of IE6 and 7 but this does not seem to be an issue because
each laptop has a different version (1 has IE7, the other has IE6).
Application will not allow browsers other than IE5.5 or higher (Firefox is
out)
The application requires an ActiveX control to interface with the scanner.
Check scanning is not an issue.

I have tried the following:
Disabling local Windows Firewall, Defender, AV
Running as local administrator

Has anyone seen something like this before?

[Bob Barrows [MVP]]

JG@HG wrote:

I have a client that has contracted with a bank to process checks
over the Internet. The solution includes a check scanner and APS.NET
web application.

There was no way for you to know it (except maybe by browsing through some
of the previous questions in this newsgroup before posting yours - always a
recommended practice) , but this is a classic (COM-based) asp newsgroup.
ASP.Net bears very little resemblance to classic ASP so, while you may be
lucky enough to find a dotnet-knowledgeable person here who can answer your
question, you can eliminate the luck factor by posting your question to a
group where those dotnet-knowledgeable people hang out. I suggest
microsoft.public.dotnet.framework.aspnet or the forums at www.asp.net.

--
Microsoft MVP - ASP/ASP.NET
Please reply to the newsgroup. This email account is my spam trap so I
don't check it very often. If you must reply off-line, then remove the
"NO SPAM"

[=?Utf-8?B?SkdASEc=?=]

I should have done my homework a little better! Thanks.

"Bob Barrows [MVP]" wrote:

JG@HG wrote:

I have a client that has contracted with a bank to process checks
over the Internet. The solution includes a check scanner and APS.NET
web application.

There was no way for you to know it (except maybe by browsing through some
of the previous questions in this newsgroup before posting yours - always a
recommended practice) , but this is a classic (COM-based) asp newsgroup.
ASP.Net bears very little resemblance to classic ASP so, while you may be
lucky enough to find a dotnet-knowledgeable person here who can answer your
question, you can eliminate the luck factor by posting your question to a
group where those dotnet-knowledgeable people hang out. I suggest
microsoft.public.dotnet.framework.aspnet or the forums at www.asp.net.

--
Microsoft MVP - ASP/ASP.NET
Please reply to the newsgroup. This email account is my spam trap so I
don't check it very often. If you must reply off-line, then remove the
"NO SPAM"