callout in metadata capturing

nhe

Hi all:

Does anyone know if callouts can be used within the datacapture.cfg for setting metadata(extended attributes)?
I thought it is possible, since they can be used for templating data records, and the datacapture.cfg files are virtually identical in format.
When I copied over cgi-callout elements that worked for data record captures(from cfg file to cfg file), it stopped working for the metadata captures.
For the metadata capture, after selecting some information from the callout window, and clicking the OK button, nothing happens, while in the data record capture, the selected information would be passed back to the data record field and the callout window closed.

I can't seem to figure out the problem. Am I missing some fundamental differences between metadata and data record capturing?

Thanks in advance.