Problem printing assembled forms

Hi,

I have 4 forms in the following sequence:

Form 1 - 8.5x11 - Duplex - 4 pages

Form 2 - 8.5x14 - Simplex - 1 page

Form 3 - 8.5x14 - Duplex - 2 pagres

Form 4 - 8.5x11 - Simplex - 1 page

I am assembling these forms using invokeDDX. When I print the merged/assembled output directly using generatePrintedOutput, this package prints perfectly.

Whereas when I print using generatePDFOutput, Form 3 starts printing on the backside of Form 2. Whereas Form 4 prints alright as a single page Simplex.

What might be going wrong? The DDX that I have simply takes the XDPs and generates merged XDP.

Please help.

Thanks,

Phoenix