inserting linebrakes in multisite forms

He everybody, I am wondering how to insert the linebrakes into mulitsite forms. Example: One Form has a textfield, I submit it to another html site where there is another form with a textfield. Inside this textfield I place a hidden field with the value of the field from page 1 then I submit to the actual php site inserting the values into a db. at this point I do insert the linebrakes (nl2br) but only the field from page 2 is really stored with linebrakes the other one is not. How come? Has anybody a good idea or even know how to do this?