Deployed reports fail

Help!
I have created some reports in the Visual Studio client, here they work ok
and I can preview the output. But when I deploy them to the reportserver
although the client reports all is well...
Deploying data source '/IODINE Reporting Project/Projectserver'.
Deploying report '/IODINE Reporting Project/Official Milestones - Drill Down'.
Deploying report '/IODINE Reporting Project/Official Milestones - Matrix'.
Deploy complete -- 0 errors, 0 warnings
========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ========== ========== Deploy: 1 succeeded, 0 failed, 0 skipped ========== ... I can see them on the server, but when I try to run them I get...
An error has occurred during report processing.
Cannot create a connection to data source 'Projectserver'.
For more information about this error navigate to the report server on the
local server machine, or enable remote errors
Anybody any ideas?Hi,
This might be because the data source credentials are not persisting
in the reportserver. Enter the credentials in the data source using the
report manager or set the option to persist the user name and password
by selecting "allow saving password" in the datalink screen.|||Hi Raghu,
Thanks, but we are using Windows Authentication (Integrated Security)
Cheers,
Geoff
"Raghu" wrote:
> Hi,
> This might be because the data source credentials are not persisting
> in the reportserver. Enter the credentials in the data source using the
> report manager or set the option to persist the user name and password
> by selecting "allow saving password" in the datalink screen.
>

Deploy project - error

When i deployed my data source and reports, i see in my output screen
warning message
'Warning : Cannot deploy data source ReportsDS to the server because it
already exists and OverwriteDataSources is not specified.'
What is this mean?In VS, right click on the Project name in the Solution explorer window to
see the properties, change OverwriteDataSources from false to true (if you
want to deploy a revised data source)
"GGill" <GGill@.discussions.microsoft.com> wrote in message
news:07D8BE07-848F-472D-9991-95F5689E3B62@.microsoft.com...
> When i deployed my data source and reports, i see in my output screen
> warning message
> 'Warning : Cannot deploy data source ReportsDS to the server because it
> already exists and OverwriteDataSources is not specified.'
> What is this mean?