Thanks a lot. I made a SSIS-package with import wizard in the SQL Management Studio and saved it on the database, not file system. After connection to integration services, the package is listed below saved packages\MSDB.
Then I opend Visual Studio in order to edit this package and connected in Server-Explorer to the database. Can't find the package.
I have not done it that way. When you connect to the server explorer, you are connecting to the database engine, not SSIS. If you right click on the SSIS packages node in the solution explorer and select "Add Existing Package" and follow through, you will find the stored package.