aterruit

You can only connect to servers that are running the same version Minecraft as you. Please ensure that you are using the correct version for the server you are trying to connect to.

My problem is that they do not turn on at all.

If you are using factions, please see this thread: http://forums.technicpack.net/index.php/topic,4547.0.html

Yo bro. You can't google? You SERIOUSLY couldn't just google "java version checker." Do you know how insanely easy that is?

I am also having this problem on SMP. Electrical engines, and any engine that has been placed on the server for awhile work ok. Newly placed engines are not working at all. Os: Win7Ultimate. Java: 6 Ram: 4g Allocated: 512m Graphics: Intel integrated.