Thanks for all the answers,I do work for a large organization and after asking around it seems we do have the server based Reader Extensions installed in a server. I will use them to activate the funcionality on my form.Once again thanks for the insight.

Thanks Jono,You do confirm that for enabling file attachments in Reader I do need the LiveCycle Reader Extensions, right? If so, I will try to see with my helpdesk how to proceed since I have no admin rights on my machine.

Thanks TundraSteve,I have extended it using Acrobat. I cannot seem to find LiveCycle Reader Extensions though... where can I find it? Is it a separate module? Do you think something could be missing in my LiveCycle instalation?