From BOL:
If you want to run a package from a 64-bit SQL Server Agent job in 32-bit mode, select a job step type of Operating system, and enter a command line or use a batch file that invokes the 32-bit version of dtexec.exe. You can use the dtexecui.exe utility to create the command line, and then copy and paste the command line into the job step.
MG
"There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies."
Tony Hoare
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.