I am having some parameteres in the url like the account id which I need later. but waht happens is that when the end user hits on submit I am checking some validation and when the error message is shown on the visualforce screen the page is getting refereshed and I am loosing values in the url. how can I stop that referesh when showing error msg. so that I have values. 

Hi,

 

When I try to install an app from appexchange and select sandbox as my destination org, it would not put me into the right location. Is there a problem with the AppExchange?

 

Thanks!