i'm having a problem with the routing engine. when i try to start it-it gives the error message. The path is not valid. therefore mail is not being routed in the exchange. the history behind the problem is as follows: installed iomega peerless drive on the server on saturday-on reboot got the infamous inaccessible_boot_device. had to repair windows-had some problems after this with exchange but i got most of them sorted all but this one. regards troy