MS CRM Upgrade from 2011 to 2013

Hi Guys,

Am going MS CRM Upgrade from 2011 to 2013 using import organization. when I import organization I got below error. Please suggest any one.

14:45:35| Error| Exception occured during Microsoft.Crm.Tools.Admin.OrganizationUpgrader: Error.ActionFailed Microsoft.Crm.Tools.Admin.UpgradeDatabaseAction
InnerException:
Microsoft.Crm.CrmException: Database having version 6.1.0.581 is not supported for upgraded.
at Microsoft.Crm.Setup.Database.DatabaseInstaller.ValidateUpgrade(CrmDbConnection connection, ReleaseInfo releaseInfo, Boolean throwIfNotUpgradeable)
at Microsoft.Crm.Setup.Database.DatabaseInstaller.ValidateUpgrade(DatabaseUtility database, ReleaseInfo releaseInfo, Boolean throwIfNotUpgradeable)
at Microsoft.Crm.Setup.Database.DatabaseInstaller.installInternal(Boolean isInstall)
at Microsoft.Crm.Setup.Database.DatabaseInstaller.Install(Int32 languageCode, String configurationFilePath, Boolean upgradeDatabase, Boolean isInstall)
at Microsoft.Crm.Setup.Database.DatabaseInstaller.Install(Int32 languageCode, String configurationFilePath, Boolean upgradeDatabase)
at Microsoft.Crm.Tools.Admin.InstallDatabaseAction.Do(IDictionary parameters)
at Microsoft.Crm.Setup.Shared.CrmAction.ExecuteAction(CrmAction action, IDictionary parameters, Boolean undo)

Cheers,

Kannan. S