Simply put: This has been going on since last Alice. Wireless Redstone just stops working after awhile. It should be noted that this frame machine hasn't moved an inch at all.
This only happens after a restart. Just break and replace your wireless stuffz and/or set the frequency with the WR remote, then you should be right as rain.
lawl, I didn't say it was a feasible solution, i just gave you the solution to fix it But yeah, every restart, unless your machine is unloaded iirc.
Try Railcraft signal boxes. They work very similar to Wireless Redstone, except that they are linked 1-block-to-1-block and need a support block under them. Maybe those won't reset after a restart.
Hmm... I'll try it out. Wasn't it the singal controller that crashes the server thou? If all else fails, I can always code a Computercraft variant of Wireless Redstone.