In the address nodes, check to make sure you have populated the 'Sending Country' field, and with the correct country. Also verify that you have specified an adequate number of lines in the 'Number of Lines to be Used' field. The final field with which you can experiment in the form itself is the 'Priority of Lines' field, but I am not sure that will help in your case.
If the above suggestions don't solve your issue, then you will need to make tweaks external to the form, either in country configuration (field T005-ADDRS) or within a user-exit in the ADDRESS_INTO_PRINTFORM function module -- which the form calls behind the scenes. Based on my extensive experience with both of these options, I would recommend them only as a last resort.
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