Adding text to OneOrder during PPF-action

Hello everybody.

I would like to add text (of a already customized text_type) to a crm order (type SLFN) during a PPF action.

The CRM_ORDER_MAINTAIN and CRM_ORDER_SAVE are working fine in a stand-alone function module. But if I use the maintain without save (cause save inside PPF will result in a double perform of the PPF) the text is not saved.

The call of CRM_ORDER_MAINTAIN is filled identically to the call got from debugging the online transaction.

I assume the problem is in not filling the text box in the one order transaction.

Anybody an idea?

Thanks in advance,

Timo.