Update Statement Not Working

I've got the following update statement:

UPDATE ISSUE_ACTIONS
SET BAE_FLAG = 2
WHERE IA_ISSUE_NO = 399
AND IA_SEQUENCE = 20

The fields BAE_FLAG, IA_ISSUE_NO, and IA_SEQUENCE are all of the type int.

When I run this code inside of my windows app (C#),

cmd3.CommandText = "UPDATE ISSUE_ACTIONS " +
"SET BAE_FLAG = 2 " +
"WHERE IA_ISSUE_NO = 437 " +
"AND IA_SEQUENCE = 13";

try
{
cmd3.ExecuteNonQuery();
}
catch (Exception e)
{
throw (e);
}

I get a timeout error:

Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
The statement has been terminated.

But when I run the SAME statement from Query Analyzer, it executes without a problem.

Has anyone run into this issue before? How do I get around this?

The CommandTimeout property of cmd3 is set to the default because this is not a complex query and should not take more than .5 seconds to execute.