Problem Cannot log onto my server

[Moryse]

So, today i downloaded the mindcrack server files so me and my friends could play on a server. I clicked the Mindcrack.jar and the server started, than when i tried to login it says Forge Mod Loader has found World ID Mismatches and then on the next line most of its cutoff, and at the bottom it says Cannot connect to Server

 

[Greedseed]

we need a crash log.