Script tasks not pre-compiling all of a sudden

I've been building and running script tasks for years without issue. Then all of sudden last week Visual Studio starts showing the "Task is configured to pre-compile the script, but binary code is not found" error anytime I open a script -- even I make no changes. If I copy the dtsx package to another machine, the script compiles fine and I can see the binary data in the raw .dtx file -- so I know the code is correct.

I can also reproduce the error simply by adding a new script task, going into "Design Script", make no changes to the default code (which is basically one line: Dts.TaskResult = Dts.Results.Success) and simply press "OK" on the Script Task Editor.

I've been trying to find some VS setting somewhere that might stop the script IDE from producing the binary code, but I can't. It doesn't seem to be project setting, because all my SSIS projects are now suffering this problem on my main dev box.

Anyone experience this?

Did you just recently apply a bunch of Microsoft patches?

Did you see this thread? http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1855810&SiteID=1

screenshots showing solution

After setting up
SQL2005express server with
mixed authentification I got the problem

1. I couldnt find a working ConnectionString
2. Studio2005 didnt connect to SQL any more

In the meantime I found that at least the following OLEDB-ConnectionString is working, when Im logged in as admin and can use Windows Autentication:

Provider='sqloledb'
Data Source='.' - without '/SQLEXPRESS' !!
Initial Catalog='MyDatabaseName'
Integrated Security='SSPI'

For details of SQL setup and code to test possible connetion strings
please see my homepage.
Martin
text of my question from 02 Dec 2005
I want to feed data of a C++ 6.0 project into SQL server and hoped that StudioExpress would give me the correct connection string in detail.
But my StudioExpress doesnt conntect to a SQL server configured for SQL-Authentication.
I made screenshote of the details an put them in subfolders of my homepage
http://home.arcor.SQL2005.
Does anybody know what exact connection string has to be used and which changes in StudioExpress AdvancedConnectionProperties are necessary to establish a working connection?

The above link contains a collection of screenshots with details of the problem.
In the meantime I did a standard setup of the whole StudioExpress2005 C# paket and put screenshots on my homepage where you can see the difference between standard setup and single SQLExpress setup in SQL-Authentication mode.
Martin