ok, last post said to go into application manager and clear caches...
not seeing where to do this, settings, applications, manage applications, only shows market, of the apps you say to clear, no gmail, no gtalk. Tried that anyway, only clearing cache of market, and no change, the downloads seem to start, but stop after several seconds, with the download unsuccessful message. This phone has been unable to download for several days now.
this is on a samsung moment on android 2.1