Time is stored in XML as 24 hour time, with minutes and seconds. So, if you wanted to set a time field to 3 pm (for example) you'd set it to 15:00:00. This means you'll need to do more than just set the field to the concatenated value of your two fields. Personally, I would change the first dropdown to have the time plus am / pm, and have that for the display, with the value in the time format expected by IP. See attached sample - save the file locally, right click and select design, then you can preview it. I only added a few sample times to the dropdown, but it should give you the general idea.
Hilary Stoupa
