Problem using the Form function in Word

Question

Hi All,

I've only just learnt how to create a form in word (2007) and have run into a problem.  On my form I have a combination of drop down menus and plain text (where I want a free text field).  When I save the document and re-open to test I run into a problem where by if I use the drop down menus before entering the plain text fields it locks these plain text fields.  Where as if I fill out the plain text field before using the drop down menus it works fine.  Is there some link between the two?  I have tried looking in the properties of the plain text field but couldn't see much that I could change.

If anyone has any suggestions then I would really appreciate it.

Thanks,

Chris