[Q] How to update android 2.2 to android 4.2 GT-I5500

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http://forum.xda-developers.com – Hello, I am trying to install new android OS. I am trying to install with tutorial in this page ankurtechblog_blogspot_com They said I need to backup EFS folder... I rooted my phone with program SuperOneClickv2.2-ShortFuse. Now I downloaded EFS_Pro_1.9.12_Release and when I want to backup it says: Checking Device Connection... Device Connected! Checking ROOT Access... Okey. Backing Up Device`s '/efs' Folder, Please Wait... Detected '/efs' Partition Location: Failed! Error: Can`t Locate Mount Point! EFS Backup Failed! Operation Finished! What do I do wrong ? Is there may (HowTos)