It says Application cannot be started, contact the application vendor
Please help
And then when i click details:
PLATFORM VERSION INFO
    Windows             : 6.1.7601.65536 (Win32NT)
    Common Language Runtime     : 4.0.30319.269
    System.Deployment.dll         : 4.0.30319.1 (RTMRel.030319-0100)
    clr.dll             : 4.0.30319.269 (RTMGDR.030319-2600)
    dfdll.dll             : 4.0.30319.1 (RTMRel.030319-0100)
    dfshim.dll             : 4.0.31106.0 (Main.031106-0000)

SOURCES
    Deployment url            : file:///C:/Users/Carrie%20Gong/Downloads/SmartSource.MediaManager.application

IDENTITIES
    Deployment Identity        : SmartSource.MediaManager.application, Version=1.1.0.183, Culture=neutral, PublicKeyToken=cf7dc25ebbb91b35, processorArchitecture=msil

APPLICATION SUMMARY
    * Online only application.
    * Trust url parameter is set.
ERROR SUMMARY
    Below is a summary of the errors, details of these errors are listed later in the log.
    * Activation of C:\Users\Carrie Gong\Downloads\SmartSource.MediaManager.application resulted in exception. Following failure messages were detected:
        + Deployment and application do not have matching security zones.

COMPONENT STORE TRANSACTION FAILURE SUMMARY
    No transaction error was detected.

WARNINGS
    There were no warnings during this operation.

OPERATION PROGRESS STATUS
    * [7/18/2012 5:21:28 PM] : Activation of C:\Users\Carrie Gong\Downloads\SmartSource.MediaManager.application has started.
    * [7/18/2012 5:21:28 PM] : Processing of deployment manifest has successfully completed.
    * [7/18/2012 5:21:28 PM] : Installation of the application has started.

ERROR DETAILS
    Following errors were detected during this operation.
    * [7/18/2012 5:21:28 PM] System.Deployment.Application.InvalidDeploymentException (Zone)
        - Deployment and application do not have matching security zones.
        - Source: System.Deployment
        - Stack trace:
            at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, IDownloadNotification notification, DownloadOptions options, Uri& appSourceUri, String& appManifestPath)
            at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, Uri& appSourceUri, String& appManifestPath)
            at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
            at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
            at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
            at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)

COMPONENT STORE TRANSACTION DETAILS
    No transaction information is available.