dtsinstall.exe does not deploy packages

1. I created SSIS project solution in VS2008. 2. I created 5 packages and deployed them to SSIS Storage succesfully. 3. I executed 4 packages successfully. 4. I leave SQL server few days alone (holiday!). 5. I open SSIS solution and made little change in 5th package. Save and Build solution. 6. I execute an deploy (same way as before, using dtsinstall.exe ..) **Change does not apply**. 7. I deleted package from SSIS storage. 8. I Execute deploy again.. but.. **package is missing**.. *Deploying is allways successfull **why packages are not loaded to server ?** What am i missing ? Thank you