For those who need version 6.0 use this magnet link:
magnet:?xt=urn:btih:DFD38099181BA8AE7DD29E7F72288C556C93EF35&dn=routeros-6.0&tr=http%3a%2f%2ftracker.mikrotik.com%2f

Check System->Routerboard->Settings if CPU Frequency is not set at minimum.

After export check all interfaces by name if corresponding correctly by name. Just put ethernet cable in first (eth1) port and check in winbox if on eth1 appear R (ready state). Do this for all ports of your RB1100AHx2. Hehe they fix this problem in v5.12: "winbox, webfig - sort ethernet inter...

After enabling pptp service in IP->Firewall->Service Port you still no luck with connection to your PPTP server or you just cannot reach 192.168.0.0/24 network?
If you cannot reach 192.168.0.0/24 you just need to add a new route to 10.0.0.0/24 with ether2-local-master as gateway.

There you can find all answers about upgrading your RouterOS http://wiki.mikrotik.com/wiki/Manual:Upgrading_RouterOS And about upgrading your Routerboard bootloader http://wiki.mikrotik.com/wiki/Manual:Bootloader_upgrade Method that you tried doing System->Auto Upgrade is related to already FTP conf...