I found my mistake (i think)
1st I have created the pages with Data Assist
2nd I have put the CSS form builder in action, found the problem with my date field, its written here in the forum about date options in design options.
3- i did the FileUpload , replacing the file field and inserting a new one.
Now all works fine.
To make it more interesting, i inserted the iRite, and all extensions are now working all toguether.
Please let me know if there is a better way, or if what i did was just luck, and thers a other way of intereacting all these elements.
Thanks so much!