Error occurred in deployment step 'Recycle IIS Application Pool':Cannot connect to the SharePoint site: http://sps01/sites/test/. Make sure that this is a valid URL and the SharePoint site is running on the local computer. If you moved this project to a new computer or if the URL of the SharePoint site has changed since you created the project, update the Site URL property of the project.

Visual studio uses the following process to deploy your solution: vssphost4.exe Open your task manager and find the process in the list; take a note of the User Name under which this process is running, let’s say it’s myadmin_account

Now, open your SQL Management Studio and ensure this Username is added as a DBOWNER to the following databases:

SharePoint_Config
SharePoint_AdminContent_[guid]
SharePoint Site Content DB

sql permissions
Close and Open your Visual Studio again, this will ensure the service is recycled; this should fix above deployment error. If you’re still having same issue, End the process in taskmanager and then re-start VS 2010.