Failed to run the package at SQL Server 2012

Hi,

I have the SSIS 2012 package runs okay. After deploy it to the SSISDB under SQL Server 2012 as ssisadm and public role.

The package export the data from another server which run SQL 2008 to Excel.

The package run failed:  

Combine to one  Excel:Error: There were errors during task validation.
Combine to one  Excel:Error: One or more component failed validation.
Combine to one Excel:Error: Excel Destination failed validation and returned error code 0xC020801C.Combine to one IAPRO Excel:Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "Excel Connection Manager IAPRO Des" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed.

ThPackage:Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available.  Source: "Microsoft Office Access Database Engine" Hresult: 0x80004005  Description: "The Microsoft Office Access database engine cannot open or write to the file '\...\TEST.xlsx'. It is already opened exclusively by another user, or you need permission to view and write its data.".  

Thanks for any idea.

Daphne