I have been working on this for three days now and have finally confirmed the issue is with simple server, after installing the newest "minecraft forge build: 94" and RedPower, I am un able to log into the server i get this error

"[SimpleServer] java.io.EOFException
[SimpleServer] PlayerStream error handling traffic for 127.0.0.1 (fffffffa)
[SimpleServer] Socket Closed: 127.0.0.1
[SimpleServer] java.io.EOFException
[SimpleServer] ServerStream error handling traffic for 127.0.0.1 (fffffffa)
[SimpleServer] Socket Closed: 127.0.0.1
java.io.FileNotFoundException: .\world\level.dat_new (Access is denied)
[SimpleServer] IP Connection from 127.0.0.1!
[SimpleServer] IP Connection from 127.0.0.1!
2012-04-24 10:13:16 [INFO] dukevyner [/127.0.0.5:52346] logged in with entity id
82 at (307.3125, 97.0, 207.90625)
[SimpleServer] Socket Closed: 127.0.0.1
[SimpleServer] java.io.IOException: Unable to parse unknown PlayerStream packet
0x6d for player dukevyner (after 0xfffffffa
[SimpleServer] PlayerStream error handling traffic for 127.0.0.1 (fffffffa)"

The error only occurs when the server has forge, and the client has RedPower "control" (1/7 parts in Redpower)
i know the issue is with simple server as this does not occur in the vanilla server