First Flex Form is not Rendering

hi :)

i created my very first flex form, following a adobe help file, i am using the lcConnection, the workspace-runtime.swc, and the form varialbe in the workbench process, but my form just does not want to load.

i am also getting the following error in Flex Builder:

Design mode: Cannot load workspace-runtime.swc (reason: ERROR: Load Verify). It may require classes (such as Adobe AIR components) that are not supported by design mode. Check the Eclipse error log for more details. myfirstLCapp/src myfirstLCapp.mxml Unknown 1238015704158 40

please help me figure this out :(