I had this problem before in using PHP data services. The fix for my problem was to edit the file amf_config.ini
to set the zend_path =C:\www\ZendFramework\library
This tells Flex where to find your ZendFramework library which makes your PHP data connection for your flex code.
You may also need to set the webroot as in webroot =C:/www/flex4/DBWorkspace/DBaccess
The webroot should be the path to your current project workspace.
The amf_config.ini file is listed under Flash Builder's package exlporer in bin-debug then services.
I hope this helps, it solved my problems.
I Just wanted to throw in my 2 cents.
This may help some one in the future.
I was getting the error java.io.IOException:
turns out that my virtual path was not being compenstated for
when I set it up.
the server location was not validating occording to the FLEX rules
my file is located here
and my v-host is this
because the validation button did not work did not validate the config
I changed this=>C:\wamp\www\metrix to this C:\wamp\www\
This messed everything up and cost me many hours to discover my error
you can correct this
package(right click)->preferances->Flex Server
Don't worry about the validation configuration if you know it is correct!
Did you get this to work, as i am having the same issue, and have tried the changes refered to below, but still no JOY!!!
Did you get it figured out?
I had that issue last night and realized that my apache service had been shutdown.