I come into a big problem today, I could no longer install the sisx file into my phone.
Details: My phone is N97, and I use Nokia PC suit to install software. I always choose Nokia Application Installer to install sisx files, however, suddenly it does not work anymore. It gives the error message "Nokia application Installer, operation failed"(even when I try to reinstall application which I have successfully installed before ). But I can still uninstall applications from my N97.
Another problem is that when I try to open the "E disk" using Nokia Phone Browser, I could not do it.
Any suggestions? Should I update phone software?