It is unlikely to be a problem with the fields, as they work when accessed from a Filemaker client.
Making a new simple layout for testing that contains the affected fields and accessing that test layout through IWP may point to the problem.
Trying a different browser would also be advisable.
The Computer Guy, Seattle
Its not exactly 100% what You said, but it got me to think and test, and I figured what was wrong!
We have several tabs in body of a layout, and a couple of fields in the header. Those fields are actualy a copy of fields from the body, for easy reference of our agents..
The fields thet were "not able" to be inserted are exactly the ones which were doubled. I dont know why, but the fields that are doubled or supposed to copy itself by autocalculation to other field do not work!
Thanks, You are a champ!