Flex xml datagrid problem

Question

I have multiple datagrids in my project that all get data from a HTTPService. This HTTPservice returns an xml.

I also got several forms that use a HTTPService to insert data into the MySQL tables.

All of this is working fine BUT

When I insert something in the MySQL DB I want to update the datagrids. What I do is httpservice.send() again after I inserted the data and I do the datagrid.provider = newdata.

But refreshes datagrid when request is sent in button click.......

Any ideas.....thanx