This is misleading
When done creating and testing the SSIS package on your workstation, be sure to change in Solution Explorer the Debugging properties back to Run64BitRuntime to true prior to running or scheduling it to run from a 64 bit server.
As:
"The Run64BitRuntime project property applies only at design time."
http://msdn.microsoft.com/en-us/library/ms141766(v=sql.105).aspx