Alphard 0 Newbie Poster

Hi guys I've been having difficulties in publishing my project. Actually installing it, I can publish projects but I can't seem to install it. Everytime I publish it this error pops out:

Application validation did not succeed. Unable to continue.
Here's the rest of the errors when I click the details.

ERROR DETAILS

Following errors were detected during this operation.
* [10/5/2009 5:21:28 PM] System.Deployment.Application.InvalidDeploymentException (HashValidation)
- File, InvoiceApprovalSystem.exe.config, has a different computed hash than specified in manifest.
- Source: System.Deployment
- Stack trace:
at System.Deployment.Application.ComponentVerifier.VerifyFileHash(String filePath, Hash hash)
at System.Deployment.Application.ComponentVerifier.VerifyFileHash(String filePath, HashCollection hashCollection)
at System.Deployment.Application.ComponentVerifier.FileComponent.Verify()
at System.Deployment.Application.ComponentVerifier.VerifyComponents()
at System.Deployment.Application.DownloadManager.DownloadDependencies(SubscriptionState subState, AssemblyManifest deployManifest, AssemblyManifest appManifest, Uri sourceUriBase, String targetDirectory, String group, IDownloadNotification notification, DownloadOptions options)
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)