Not every control available in InfoPath can be used in Formotus forms.

Do not include the following controls in your forms:

• Rich text box
• Combo box
• Multiple selection list box
• Choice group, and choice section
• Recursive section
• Digital signature
• Master/detail
• Horizontal repeating table
• File attachment
• Vertical label
• Repeating choice group
• Repeating recursive section

Also: Formotus does not support any custom code in InfoPath forms.