multiple form instances problem

[Miranda]

hi,

i've got multiple instances of one of my forms opening (when selected from a
drop down box on my main form). i want to pass the value selected from the
drop down box to the instance that is opened so it can be displayed in a
text box - i've done this by setting the text box on the instance to the
value of the drop down box in the load_form procedure (not sure if this is
the right way to go about it but it seems to work). however when i try to
close the instances that has been opened i get a message saying that i
cannot edit or delete any info because one of the tables relies on it. and
then a message saying that if i close the window all changes will be
discarded. since i haven't actually changed anything i'm not sure why this
is happening. i thought it might be dirty - so i did a test for that but
apparently thats not the problem...

any ideas? this multiple instances thing is v. confusing!

thanks,
miranda