Android Market Stopped Working Possible Duplicate:
  Sometimes Market update get stuck downloading, how can I cancel?  




I have Android 1.6 on original G1. I tried to install Last.FM application and it failed. Since then I always see Last.FM there in process of installation and it can't be canceled or removed or anything.

And what's worse: then installation of new application stopped working at all. Coming back always after a while with "[application] failed to download. Try again later".

Any idea, how to "unblock" the market again?
This might help:
Go to Settings >> Applications >> Manage Applications 
Select Market app and in the details page, press "Clear data".

I had this issue a while back and it got resolved after performing the above.